ORCID Profile
0000-0001-8981-7479
Current Organisation
James Cook University
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Publisher: Cambridge University Press (CUP)
Date: 25-09-2002
DOI: 10.1017/S0266467402002626
Abstract: In 1999, Dalling & Harms simulated 100% above-ground herbivory on seedlings of Gustavia superba , a large-seeded species from Barro Colorado Island, Panama, and showed the remarkable ability for cotyledons to regenerate up to eight new shoots. They used this evidence to propose that cotyledon size (at least in this species)was adaptive in surviving pre- and early post-germination hazards (Dalling & Harms 1999). In this note we describe the first record of multiple resprouting in an Australian tropical plant species. Idiospermum australiense (Diels) S. T. Blake (Calycanthaceae) exhibits characteristics similar (but not identical) to G. superba that support the contention of Dalling & Harms (1999).
Publisher: SAGE Publications
Date: 09-2015
DOI: 10.1177/194008291500800309
Abstract: Forests of Asia-Pacific islands have undergone degradation by some of the worst-known selective logging practices in the tropics. It is unclear whether severely damaged forests can return to a pre-logging state via natural regeneration, or whether active restoration is required. In this review, we highlight how the socioeconomic dynamics in the Solomon Islands promote excessive logging, resulting in highly degraded forests. We detail seven key elements currently promoting excessive logging in this region: (i) economic interests, (ii) corruption, (iii) poor employment conditions in the logging sector, (iv) high forest accessibility, (v) resource limitations for forest monitoring, (vi) contention over logging benefits, and (vii) a paucity of information for policy development. Though research on the regeneration capacity of logged forests in the Solomon Islands remains extremely limited, we suggest that some logged forests in the country may require active restoration—especially those that have been most heavily damaged. Our argument is based on previous tree planting initiatives in logged forest in the 1970s and 1980s. We propose three broad restoration techniques—enrichment planting, direct seeding, and the use of artificial perches—as viable options to help restore logged forests in the Solomon Islands. Lastly, we recommend the conservation-concession model to aid forest restoration, given its recent success in the region.
Publisher: Wiley
Date: 10-10-2013
DOI: 10.1111/ETH.12172
Publisher: Elsevier BV
Date: 07-2016
Publisher: Oxford University Press (OUP)
Date: 06-2010
Publisher: Wiley
Date: 07-2009
Publisher: MDPI AG
Date: 07-10-2020
DOI: 10.3390/D12100384
Abstract: Consumer communities play an important role in maintaining ecosystem structure and function. In seagrass systems, algal regulation by mesograzers provides a critical maintenance function which promotes seagrass productivity. Consumer communities also represent a key link in trophic energy transfer and buffer negative effects to seagrasses associated with eutrophication. Such interactions are well documented in the literature regarding temperate systems, however, it is not clear if the same relationships exist in tropical systems. This study aimed to identify if the invertebrate communities within a tropical, multispecies seagrass meadow moderated epiphyte abundance under natural conditions by comparing algal abundance across two sites at Green Island, Australia. At each site, paired plots were established where invertebrate assemblages were perturbed via insecticide manipulation and compared to unmanipulated plots. An 89% increase in epiphyte abundance was seen after six weeks of experimental invertebrate reductions within the system. Using generalised linear mixed-effect models and path analysis, we found that the abundance of invertebrates was negatively correlated with epiphyte load on seagrass leaves. Habitat species richness was seen to be positively correlated with invertebrate abundance. These findings mirrored those of temperate systems, suggesting this mechanism operates similarly across latitudinal gradients.
Publisher: Pacific Science
Date: 10-2013
DOI: 10.2984/67.4.10
Publisher: Wiley
Date: 25-04-2007
Publisher: Springer Science and Business Media LLC
Date: 20-07-2016
DOI: 10.1038/SREP30012
Abstract: Tropical forests are major contributors to the terrestrial global carbon pool, but this pool is being reduced via deforestation and forest degradation. Relatively few studies have assessed carbon storage in degraded tropical forests. We s led 37,000 m 2 of intact rainforest, degraded rainforest and sclerophyll forest across the greater Wet Tropics bioregion of northeast Australia. We compared aboveground biomass and carbon storage of the three forest types, and the effects of forest structural attributes and environmental factors that influence carbon storage. Some degraded forests were found to store much less aboveground carbon than intact rainforests, whereas others sites had similar carbon storage to primary forest. Sclerophyll forests had lower carbon storage, comparable to the most heavily degraded rainforests. Our findings indicate that under certain situations, degraded forest may store as much carbon as intact rainforests. Strategic rehabilitation of degraded forests could enhance regional carbon storage and have positive benefits for tropical bio ersity.
Publisher: Wiley
Date: 07-04-2011
Publisher: Wiley
Date: 18-05-2007
Publisher: Informa UK Limited
Date: 2006
Publisher: Wiley
Date: 21-08-2017
DOI: 10.1111/NPH.14735
Abstract: Tall plant species disperse further distances than do short species, within and across dispersal syndromes, yet the driver underpinning this relationship is unclear. The ability of taller plants to invest more in dispersal structures may explain the positive relationship between plant height and dispersal distance. Here, we quantify the cross-species relationships between presence of dispersal structures, dispersal investment plant height and dispersal distance. Plant height, dispersal syndrome and dispersal investment data were collated for 1613 species from the literature, with dispersal distance data collated for 114 species. We find that species with high dispersal investment disperse further than do species with low dispersal investment. Tall species have a greater probability of having dispersal structures on their seeds compared with short species. For species with dispersal structures on their seeds, plant height is very weakly related to dispersal investment. Our results provide the first global confirmation of the dispersal investment-distance hypothesis, and show dispersal investment can be used for predicting species dispersal distances. However, our results and those of previous studies indicate plant height is still the best proxy for estimating species dispersal distances due to it being such a readily available plant trait.
Publisher: American College of Physicians
Date: 06-01-2015
Publisher: Elsevier BV
Date: 02-2013
Publisher: Springer Science and Business Media LLC
Date: 05-05-2018
Publisher: Wiley
Date: 06-05-2008
Publisher: Wiley
Date: 10-03-2005
Publisher: Wiley
Date: 11-2005
Publisher: Wiley
Date: 27-09-2013
DOI: 10.1111/ICAD.12001
Publisher: Springer Science and Business Media LLC
Date: 20-07-2017
DOI: 10.1038/S41598-017-06590-5
Abstract: Human-induced forest fragmentation poses one of the largest threats to global ersity yet its impact on rattans (climbing palms) has remained virtually unexplored. Rattan is arguably the world’s most valuable non-timber forest product though current levels of harvesting and land-use change place wild populations at risk. To assess rattan response to fragmentation exclusive of harvesting impacts we examined rattan abundance, demography and ecology within the forests of northeastern, Australia. We assessed the community abundance of rattans, and component adult ( m) and juvenile (≤3 m) abundance in five intact forests and five fragments (23–58 ha) to determine their response to a range of environmental and ecological parameters. Fragmented forests supported higher abundances of rattans than intact forests. Fragment size and edge degradation significantly increased adult rattan abundance, with more in smaller fragments and near edges. Our findings suggest that rattan increase within fragments is due to canopy disturbance of forest edges resulting in preferential, high-light habitat. However, adult and juvenile rattans may respond inconsistently to fragmentation. In managed forest fragments, a rattan abundance increase may provide economic benefits through sustainable harvesting practices. However, rattan increases in protected area forest fragments could negatively impact conservation outcomes.
Publisher: Wiley
Date: 22-11-2006
Publisher: Wiley
Date: 06-12-2011
Publisher: Wiley
Date: 23-11-2005
Publisher: Springer Science and Business Media LLC
Date: 24-05-2019
DOI: 10.1038/S41598-019-44288-Y
Abstract: While the conservation role of remaining natural habitats in anthropogenic landscapes is clear, the degree to which agricultural matrices impose limitations to animal use is not well understood, but vital to assess species’ resilience to land use change. Using an occupancy framework, we evaluated how oil palm plantations affect the occurrence and habitat use of terrestrial mammals in the Colombian Llanos. Further, we evaluated the effect of undergrowth vegetation and proximity to forest on habitat use within plantations. Most species exhibited restricted distributions across the study area, especially in oil palm plantations. Habitat type strongly influenced habitat use of four of the 12 more widely distributed species with oil palm negatively affecting species such as capybara and naked-tailed armadillo. The remaining species showed no apparent effect of habitat type, but oil palm and forest use probabilities varied among species. Overall, generalist mesocarnivores, white-tailed deer, and giant anteater were more likely to use oil palm while the remaining species, including ocelot and lesser anteater, showed preferences for forest. Distance to nearest forest had mixed effects on species habitat use, while understory vegetation facilitated the presence of species using oil palm. Our findings suggest that allowing undergrowth vegetation inside plantations and maintaining nearby riparian corridors would increase the likelihood of terrestrial mammals’ occurrence within oil palm landscapes.
Publisher: Wiley
Date: 11-2005
Publisher: Wiley
Date: 12-05-2005
Publisher: Springer Science and Business Media LLC
Date: 11-10-2012
DOI: 10.1007/S00442-011-2146-2
Abstract: Models of impacts of climate change on species are generally based on correlations between current distributions and climatic variables, rather than a detailed understanding of the mechanisms that actually limit distribution. Many of the vertebrates endemic to rainforests of northeastern Australia are restricted to upland forests and considered to be threatened by climate change. However, for most of these species, the factors controlling their distributions are unknown. We examined the role of thermal intolerance as a possible mechanism limiting the distribution of Pseudochirops archeri (green ringtail possum), a specialist arboreal folivore restricted to rainforests above an altitude of 300 m in Australia's Wet Tropics. We measured short-term metabolic responses to a range of ambient temperatures, and found that P. archeri stores heat when ambient temperatures exceed 30°C, reducing water requirements for evaporative cooling. Due to the rate at which body temperature increases with ambient temperatures >30°C, this strategy is not effective over periods longer than 5 h. We hypothesise that the distribution of P. archeri is limited by interactions between (i) the duration and severity of extreme ambient temperatures (over 30°C), (ii) the scarcity of free water in the rainforest canopy in the dry season, and (iii) constraints on water intake from foliage imposed by plant secondary metabolites and fibre. We predict that dehydration becomes limiting for P. archeri where extreme ambient temperatures (>30°C) persist for more than 5 h per day over 4-6 days or more. Consistent with our hypothesis, the abundance of P. archeri in the field is correlated with the occurrence of extreme temperatures, declining markedly at sites where the average maximum temperature of the warmest week of the year is above 30°C. Assuming the mechanism of limitation is based on extreme temperatures, we expect impacts of climate change on P. archeri to occur in discrete, rapid events rather than as a slow contraction in range.
Publisher: Wiley
Date: 05-1996
Publisher: Wiley
Date: 12-1998
Publisher: Springer Science and Business Media LLC
Date: 12-10-2017
DOI: 10.1038/HDY.2016.85
Publisher: Public Library of Science (PLoS)
Date: 04-2015
Publisher: Wiley
Date: 10-11-2017
Publisher: CSIRO Publishing
Date: 2013
DOI: 10.1071/WR12198
Abstract: Context The west coast of the Cape York Peninsula (CYP) is a major nesting ground for three species of threatened marine turtle, namely, the flatback (Natator depressus), olive ridley (Lepidochelys olivacea) and hawksbill (Eretemochelys imbricata). Marine turtle nests in this area experience high rates of depredation and unpublished data from numerous studies have suggested that feral pigs are responsible for most nest losses. Aims The aim of the present study was to identify the relative magnitude of nest mortality associated with physical processes versus depredation and to distinguishing between two possible pig depredation scenarios. Methods We documented laying and mortality patterns on Pennefarther Beach (CYP) over a 49-day period in 2007. We partitioned mortality into components attributable to beach erosion, inundation and depredation and also assessed the relative magnitude of depredation associated with different nest predators. We used these data to test whether the temporal and spatial pattern of pig depredation was random with respect to patterns of nest availability. Key results The overall level of nest mortality was 40.2%. Depredation was responsible for 93% of nest losses. Pig predation was high, accounting for 89.6% of all mortality. Depredation occurred equally across nests of all three turtle species. Although nests were laid uniformly in both time and space, pig depredation was significantly clustered. Conclusions Depredation by feral pigs was the principal cause of turtle nest mortality in the present study. The pattern of nest destruction was consistent with the occurrence of pig depredation by single in iduals in discrete feeding areas. Implications Current feral pig management involves aerial shooting. This is effective at removing large numbers of animals over large areas. However, aerial shooting is also expensive. Our results suggest that targeted monitoring and eradication of locally active in iduals depredating nests may better manage pig impacts, specifically those on turtle nests.
Publisher: SAGE Publications
Date: 2021
DOI: 10.1177/19400829211028125
Abstract: Much of the lowland tropical forests in the Solomon Islands have been heavily logged. However, little is known about the recovery status of these forests. We examined factors that influenced the recovery of forest structural attributes within 50 years after selective logging on Kolombangara Island in the western Solomon Islands. Twelve study sites—six logged and six unlogged—were identified across the Island, with two logged sites in each of three recovery-time classes: 10, 30, and 50 years after logging. Within each study site, 12 0.1-ha plots were randomly established, and a series of forest attributes measured in each plot. Our results revealed that local logging intensity and soil attributes have stronger influence on forest-structural recovery than do site attributes such as local topography or tree architecture. Furthermore, half a century of regeneration following logging is insufficient to permit full recovery of forest structure. We conclude that logged forests on Kolombangara and possibly across the Solomon Islands may not fully recover structurally before the next logging cycle, in the absence of a policy on re-entry harvesting. The development of such a policy coupled with robust forest-management measures is pivotal to facilitating sustainable logging while supporting bio ersity conservation in the Solomon Islands. This may be the last best hope for saving lowland forests and their bio ersity on this unique tropical archipelago.
Publisher: CSIRO Publishing
Date: 2010
DOI: 10.1071/FP09210
Abstract: Reduction in rainfall and intensification of dry season moisture deficit threaten to expose desiccation-sensitive seeds in the seasonal tropics to greater potential negative effects of desiccation. A determinate affecting the recruitment of species under increased aridity is how quickly desiccation-sensitive seeds dehydrate. We investigated the rate of seed moisture loss in 24 species that produce desiccation-sensitive seeds in a seasonal tropical forest and tested the common hypothesis that seeds conform to a simple negative exponential model of moisture loss with time. A negative exponential model described moisture loss in 14 species, but was not the best model for the remaining 10 species. Moisture loss in eight species was best described by a double-negative exponential model and by a double-linear model in the remaining two species. We then tested the hypothesis that seed mass could predict the rate of desiccation between and within species. Within species the time to a given state of desiccation could be predicted by seed mass for eight species. Between species there was no relationship between desiccation rate and seed mass. We conclude that different modes of water loss and seed structural features may be more important than seed mass in prolonging desiccation.
Publisher: Wiley
Date: 06-2002
Publisher: Wiley
Date: 22-01-2013
Publisher: No publisher found
Date: 2015
DOI: 10.3354/ESR00696
Publisher: Wiley
Date: 06-2014
DOI: 10.1890/13-1571.1
Abstract: Lianas (climbing woody vines) are important structural parasites of tropical trees and may be increasing in abundance in response to global‐change drivers. We assessed long‐term (∼14‐year) changes in liana abundance and forest dynamics within 36 1‐ha permanent plots spanning ∼600 km 2 of undisturbed rainforest in central Amazonia. Within each plot, we counted each liana stem (≥2 cm diameter) and measured its diameter at 1.3 m height, and then used these data to estimate liana aboveground biomass. An initial liana survey was completed in 1997–1999 and then repeated in 2012, using identical methods. Liana abundance in the plots increased by an average of 1.00% ± 0.88% per year, leading to a highly significant ( t = 6.58, df = 35, P 0.00001) increase in liana stem numbers. Liana biomass rose more slowly over time (0.32% ± 1.37% per year) and the mean difference between the two s ling intervals was nonsignificant ( t = 1.46, df = 35, P = 0.15 paired t tests). Liana size distributions shifted significantly (χ 2 = 191, df = 8, P 0.0001 Chi‐square test for independence) between censuses, mainly as a result of a nearly 40% increase in the number of smaller (2–3 cm diameter) lianas, suggesting that lianas recruited rapidly during the study. We used long‐term data on rainfall and forest dynamics from our study site to test hypotheses about potential drivers of change in liana communities. Lianas generally increase with rainfall seasonality, but we found no significant trends over time (1997–2012) in five rainfall parameters (total annual rainfall, dry‐season rainfall, wet‐season rainfall, number of very dry months, CV of monthly rainfall). However, rates of tree mortality and recruitment have increased significantly over time in our plots, and general linear mixed‐effect models suggested that lianas were more abundant at sites with higher tree mortality and flatter topography. Rising concentrations of atmospheric CO 2 , which may stimulate liana growth, might also have promoted liana increases. Our findings clearly support the view that lianas are increasing in abundance in old‐growth tropical forests, possibly in response to accelerating forest dynamics and rising CO 2 concentrations. The aboveground biomass of trees was lowest in plots with abundant lianas, suggesting that lianas could reduce forest carbon storage and potentially alter forest dynamics if they continue to proliferate.
Publisher: SAGE Publications
Date: 06-2015
DOI: 10.1177/194008291500800202
Abstract: The Island of New Guinea is renowned for its high bio ersity, which arises in part from its complex geology and topographical variability. The island is, however, relatively understudied. We surveyed forest plant communities in the poorly studied Naoro-Brown catchment of the West Koiari region of Papua New Guinea. We identified four forest types—riverine successional forest, lower montane forest, hill forest, and riverine mixed forest—along a 13-km transect, and examined forest structure (tree height, stand density, and biomass) and tree species ersity (species richness, Shannon-Wiener ersity index, and composition) in these forest types. We also assessed the effect of local topography on floristic patterns. Forest structure and species ersity varied greatly among the forest types, with topography strongly affecting species assemblages. These results suggest that highly varied landscapes may contain high beta ersity via intense segregation and establishment of varied vegetation communities. Beta ersity in New Guinea may be higher than expected as such highly varied landscapes are common, yet poorly studied. To effectively conserve bio ersity in New Guinea's forests, protection must include forested landscapes that best represent the topographical variability throughout the island to account for locally endemic species restricted to specific ecological niches.
Publisher: Springer Science and Business Media LLC
Date: 25-05-2006
Publisher: Wiley
Date: 26-08-2017
DOI: 10.1111/AEC.12085
Publisher: Oxford University Press (OUP)
Date: 25-01-2013
DOI: 10.1111/BIJ.12029
Publisher: Wiley
Date: 04-2018
DOI: 10.1002/ECE3.3959
Publisher: Public Library of Science (PLoS)
Date: 19-09-2012
Publisher: Wiley
Date: 08-11-2018
DOI: 10.1111/AEC.12559
Publisher: Springer Science and Business Media LLC
Date: 07-2006
Publisher: Wiley
Date: 05-2010
Publisher: Wiley
Date: 11-2014
DOI: 10.1890/14-0330.1
Publisher: Wiley
Date: 11-2013
DOI: 10.3732/AJB.1200614
Abstract: Sprouting in woody plants promotes persistence in the face of disturbance, ultimately influencing population structure. Different disturbance regimes drive variable population responses, but there have been few direct tests of the relative differences in population structure to specific drivers. We measured population structure as genotypic ersity (clonality) as a function of hydrological regime for a riverine tree, Melaleuca leucadendra, a major structural component in flood landscapes in the Australian dry tropics. We estimated clonality, genotypic richness, and population allelic ersity. The relationship among disturbance, genetic estimates of clonality, and population distinctiveness was compared with flood regime, characterized by return frequencies and hydrological stress at in idual river reaches. Two contrasting patterns of genotypic structure were detected and corresponded to order-of-magnitude differences in flood regime between sites. At mainstem locations characterized by greatest flood intensity, sprouting generated clonal structure to 17 m (30% ramets clonal). By contrast, clonality was atypical at lower-disturbance tributaries (0% clonal). Population allelic distributions showed extensive genetic exchange among mainstem locations, but strong genetic differentiation between mainstem and tributaries. Population structure and distinctiveness in riverine Melaleuca are determined by differences in sprouting and recruitment responses that depend on localized hydrological regime. Sprouting contributes to population persistence via localized clonal growth. Resprouting following disturbance in M. leucadendra may help explain its numerical dominance in tropical river systems. This study, although preliminary, suggests that flood ecosystems may represent excellent experimental systems to develop a better understanding of whole-organism responses to environmental drivers.
Publisher: Oxford University Press (OUP)
Date: 19-11-2015
DOI: 10.1111/BIJ.12430
Publisher: SAGE Publications
Date: 09-2015
DOI: 10.1177/194008291500800317
Abstract: The inexorable expansion of oil palm plantations has been a major driver of bio ersity loss in the tropics. This is particularly evident in Malaysia and Indonesia, where the majority of the world's oil palm is cultivated. In Latin America oil palm acreage has also been steadily increasing, especially in countries such as Colombia, the largest producer by far. However, information on the biological implications of rapid land conversion to oil palm in the region remains scarce. Here, we review the state of knowledge about the impacts of oil palm on bio ersity in Colombia. We also discuss the conservation strategies that have been implemented in the country, and propose research that we need to develop best management practices. The vast majority of research has focused on biotechnology, soils, biological pest control, carbon stock and reduction of greenhouse gases emission, but research on bio ersity is very scarce, or is not published yet. However, important investment and research on this topic are being developed. The most threatened ecosystems are the savannas in the Orinoquia region, where most of the expansion is predicted. The demands for green markets and certification are slowly encouraging oil palm corporations to mitigate their ‘biological footprint‘. However, applied research on the possible impacts of oil palm on bio ersity are urgently needed to support conservation efforts in the oil-palm-dominated landscapes of Colombia, along with commitments by the government and companies to adopt the resulting recommendations.
Publisher: SAGE Publications
Date: 03-2015
DOI: 10.1177/194008291500800119
Abstract: Can the strategic incorporation of lianas (woody vines) into rainforest restoration plantings enhance bio ersity-conservation outcomes? Lianas are an integral component of primary tropical rainforests yet are often omitted from rainforest restoration plantings as they may damage trees and compete with them for resources. However, there is increasing evidence that many ecological and physiognomic characteristics of lianas may be of some value to restoration plantings, at least in certain contexts. We propose strategies for experimentally incorporating lianas into rainforest-restoration plantings to explore whether they can expedite rainforest establishment and enhance bio ersity-conservation outcomes.
Publisher: Wiley
Date: 31-10-2012
Publisher: American Association for Cancer Research (AACR)
Date: 02-2015
DOI: 10.1158/1535-7163.MCT-14-0647
Abstract: Genome-wide studies have identified a high-risk subgroup of pediatric acute lymphoblastic leukemia (ALL) harboring mutations in the Janus kinases (JAK). The purpose of this study was to assess the preclinical efficacy of the JAK1/2 inhibitor AZD1480, both as a single agent and in combination with the MEK inhibitor selumetinib, against JAK-mutated patient-derived xenografts. Patient-derived xenografts were established in immunodeficient mice from bone marrow or peripheral blood biopsy specimens, and their gene expression profiles compared with the original patient biopsies by microarray analysis. JAK/STAT and MAPK signaling pathways, and the inhibitory effects of targeted drugs, were interrogated by immunoblotting of phosphoproteins. The antileukemic effects of AZD1480 and selumetinib, alone and in combination, were tested against JAK-mutated ALL xenografts both in vitro and in vivo. Xenografts accurately represented the primary disease as determined by gene expression profiling. Cellular phosphoprotein analysis demonstrated that JAK-mutated xenografts exhibited heightened activation status of JAK/STAT and MAPK signaling pathways compared with typical B-cell precursor ALL xenografts, which were inhibited by AZD1480 exposure. However, AZD1480 exhibited modest single-agent in vivo efficacy against JAK-mutated xenografts. Combining AZD1480 with selumetinib resulted in profound synergistic in vitro cell killing, although these results were not translated in vivo despite evidence of target inhibition. Despite validation of target inhibition and the demonstration of profound in vitro synergy between AZD1480 and selumetinib, it is likely that prolonged target inhibition is required to achieve in vivo therapeutic enhancement between JAK and MEK inhibitors in the treatment of JAK-mutated ALL. Mol Cancer Ther 14(2) 364–74. ©2014 AACR.
Publisher: Wiley
Date: 05-2000
Publisher: Wiley
Date: 24-04-2012
DOI: 10.1111/J.1365-2656.2012.01988.X
Abstract: 1. We tested the hypotheses that feeding guild structure of beetle assemblages changed with different arboreal microhabitats and that these differences were consistent across rainforest tree species. 2. Hand collection and beating techniques were used from the gondola of the Australian Canopy Crane to collect beetles from five microhabitats (mature leaves, flush leaves, flowers, fruit and suspended dead wood) within the rainforest canopy. A simple randomization procedure was implemented to test whether the abundances of each feeding guild on each microhabitat were different from that expected based on a null hypothesis of random distribution of in iduals across microhabitats. 3. Beetles from different feeding guilds were not randomly distributed, but congregated on those microhabitats that are likely to provide the highest concentrations of their preferred food sources. Herbivorous beetles, in particular, were over-represented on flowers and flush foliage and under-represented on mature leaves and dead wood. Proportional numbers of species within each feeding guild were remarkably uniform across tree species for each microhabitat, but proportional abundances of feeding guilds were all significantly non-uniformly distributed between host tree species, regardless of microhabitat, confirming patterns previously found for arthropods in trees in temperate and tropical forests. 4. These results show that the canopy beetle community is partitioned into discrete assemblages between microhabitats and that this partitioning arises because of differences in feeding guild structure as a function of the ersity and the temporal and spatial availability of resources found on each microhabitat.
Publisher: Wiley
Date: 26-07-2012
Publisher: Wiley
Date: 09-07-2020
DOI: 10.1111/BRV.12636
Publisher: Wiley
Date: 12-10-2015
DOI: 10.1111/DDI.12266
Publisher: Wiley
Date: 10-2009
Publisher: Public Library of Science (PLoS)
Date: 30-06-2015
Publisher: Public Library of Science (PLoS)
Date: 24-05-2018
Publisher: Wiley
Date: 06-2001
Publisher: Wiley
Date: 2021
DOI: 10.1111/JAV.02642
Abstract: Novel noises can affect various animal behaviours, and changes to vocal behaviour are some of the most documented. The calls of invasive species are an important source of novel noise, yet their effects on native species are poorly understood. We examined the effects of invasive bird calls on the vocal activity of an endangered Australian finch to investigate whether: 1) native finch calling behaviour was affected by novel invasive bird calls, and 2) the calls of the finches overlapped in frequency with those of invasive birds. We exposed a wild population of black‐throated finch southern subspecies Poephila cincta cincta to the vocalisations of two invasive birds, nutmeg mannikins Lonchura punctulata and common mynas Acridotheres tristis , a synthetic ‘pink' noise, and a silent control. To determine whether the amount of black‐throated finch calling differed in response to treatments, we recorded and quantified black‐throated finch vocalisations, and assessed the amount of calling using a generalised linear mixed model followed by pairwise comparisons. We also measured, for both black‐throated finches and the stimulus noises: dominant, minimum and maximum frequency, and assessed the degree of frequency overlap between black‐throated finch calls and stimulus noises. Compared to silent controls, black‐throated finches called less when exposed to common myna calls and pink noise, but not to nutmeg mannikin calls. We also found that pink noise overlapped most in frequency with black‐throated finch calls. Common myna calls also somewhat overlapped the frequency range of black‐throated finch calls, whereas nutmeg mannikin calls overlapped the least. It is possible that masking interference is the mechanism behind the reduction in calling in response to common myna calls and pink noise, but more work is needed to resolve this. Regardless, these results indicate that the calls of invasive species can affect the behaviour of native species, and future research should aim to understand the scope and severity of this issue.
Publisher: Wiley
Date: 13-04-2019
DOI: 10.1111/AEC.12746
Publisher: Wiley
Date: 10-04-2006
Publisher: Elsevier BV
Date: 11-2018
No related grants have been discovered for Will Edwards.