ORCID Profile
0000-0002-6825-124X
Current Organisations
The University of Edinburgh
,
Royal Botanical Garden Edinburgh
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Publisher: Springer Science and Business Media LLC
Date: 23-07-2009
DOI: 10.1007/S00442-009-1395-9
Abstract: The persistence of mesic savannas has been theorised as being dependent on disturbances that restrict the number of juveniles growing through the sapling size class to become fire-tolerant trees. We analysed the population structures of four dominant tropical savanna tree species from 30 locations in Kakadu National Park (KNP), northern Australia. We found that across KNP as a whole, the population size structures of these species do not exhibit recruitment bottlenecks. However, in idual stands had multimodal size-class distributions and mixtures of tree species consistent with episodic and in idualistic recruitment of co-occurring tree species. Using information theory and multimodel inference, we examined the relative importance of fire frequency, stand basal area and elevation difference between a site and permanent water in explaining variations in the proportion of sapling to adult stems in four dominant tree species. This showed that the proportion of the tree population made up of saplings was negatively related to both fire frequencies and stand basal area. Overall, fire frequency has density-dependent effects in the regulation of the transition of saplings to trees in this Australian savanna, due to interactions with stem size, regeneration strategies, growth rates and tree-tree competition. Although stable at the regional scale, the spatiotemporal variability of fire can result in structural and floristic ersity of savanna tree populations.
Publisher: Wiley
Date: 30-08-2013
DOI: 10.1111/JBI.12204
Publisher: Wiley
Date: 20-09-2022
DOI: 10.1002/PPP3.10329
Abstract: Mixed species plantings present an attractive alternative to monoculture reforestation through their added benefits to bio ersity. Yet there is ambiguity in the use of the term ‘bio ersity’ in carbon and bio ersity markets, which may create perverse outcomes when designing schemes and projects. Here, we review how the concept of bio ersity is defined and applied in reforestation projects, and restoration more broadly. Improved transparency around the use of the term bio ersity is urgently needed to provide rigour in emerging market mechanisms, which seek to benefit the environment and people. Reforestation to capture and store atmospheric carbon is increasingly ch ioned as a climate change mitigation policy response. Reforestation plantings have the potential to provide conservation co‐benefits when erse mixtures of native species are planted, and there are growing attempts to monetise bio ersity benefits from carbon reforestation projects, particularly within emerging carbon markets. But what is meant by ‘bio erse’ across different stakeholders and groups implementing and overseeing these projects and how do these perceptions compare with long‐standing scientific definitions? Here, we discuss approaches to, and definitions of, bio ersity in the context of reforestation for carbon sequestration. Our aim is to review how the concept of bio ersity is defined and applied among stakeholders (e.g., governments, carbon certifiers and farmers) and rights holders (i.e., First Nations people) engaging in reforestation, and to identify best‐practice methods for restoring bio ersity in these projects. We find that some stakeholders have a vague understanding of ersity across varying levels of biological organisation (genes to ecosystems). While most understand that bio ersity underpins ecosystem functions and services, many stakeholders may not appreciate the difficulties of restoring bio ersity akin to reference ecosystems. Consequently, bio ersity goals are rarely explicit, and project goals may never be achieved because the levels of restored bio ersity are inadequate to support functional ecosystems and desired ecosystem services. We suggest there is significant value in integrating bio ersity objectives into reforestation projects and setting specific restoration goals with transparent reporting outcomes will pave the way for ensuring reforestation projects have meaningful outcomes for bio ersity, and legitimate incentive payments for bio ersity and natural capital accounting.
Publisher: CRC Press
Date: 17-11-2010
DOI: 10.1201/B10275
Publisher: Informa UK Limited
Date: 02-10-2017
Publisher: American Association for the Advancement of Science (AAAS)
Date: 18-10-2019
Abstract: Bastin
Publisher: Wiley
Date: 13-10-2008
Publisher: Cold Spring Harbor Laboratory
Date: 07-01-2021
DOI: 10.1101/2021.01.04.425314
Abstract: We introduce the AusTraits database - a compilation of measurements of plant traits for taxa in the Australian flora (hereafter AusTraits). AusTraits synthesises data on 375 traits across 29230 taxa from field c aigns, published literature, taxonomic monographs, and in idual taxa descriptions. Traits vary in scope from physiological measures of performance (e.g. photosynthetic gas exchange, water-use efficiency) to morphological parameters (e.g. leaf area, seed mass, plant height) which link to aspects of ecological variation. AusTraits contains curated and harmonised in idual-, species- and genus-level observations coupled to, where available, contextual information on site properties. This data descriptor provides information on version 2.1.0 of AusTraits which contains data for 937243 trait-by-taxa combinations. We envision AusTraits as an ongoing collaborative initiative for easily archiving and sharing trait data to increase our collective understanding of the Australian flora.
Publisher: Wiley
Date: 09-07-2008
Publisher: Wiley
Date: 28-08-2009
Publisher: Wiley
Date: 15-01-2009
Publisher: Wiley
Date: 17-01-2011
Publisher: Wiley
Date: 20-11-2019
DOI: 10.1111/AEC.12678
Publisher: Wiley
Date: 13-12-2011
Publisher: American Association for the Advancement of Science (AAAS)
Date: 31-01-2014
Abstract: Savannas are structurally similar across the three major continents where they occur, leading to the assumption that the factors controlling vegetation structure and function are broadly similar, too. Lehmann et al. (p. 548 ) report the results of an extensive analysis of ground-based tree abundance in savannas, s led at more than 2000 sites in Africa, Australia, and South America. All savannas, independent of region, shared a common functional property in the way that moisture and fire regulated tree abundance. However, despite qualitative similarity in the moisture–fire–tree-biomass relationships among continents, key quantitative differences exist among the three regions, presumably as a result of unique evolutionary histories and climatic domains.
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Caroline Lehmann.