ORCID Profile
0000-0001-8761-1768
Current Organisations
University of Zurich
,
PBL Netherlands Environmental Assessment Agency
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Publisher: SPIE
Date: 08-02-2015
DOI: 10.1117/12.2080001
Publisher: Informa UK Limited
Date: 14-06-2023
Publisher: American Association for the Advancement of Science (AAAS)
Date: 10-10-2014
Abstract: In 2010, the international community, under the auspices of the Convention on Biological Diversity, agreed on 20 bio ersity-related “Aichi Targets” to be achieved within a decade. We provide a comprehensive mid-term assessment of progress toward these global targets using 55 indicator data sets. We projected indicator trends to 2020 using an adaptive statistical framework that incorporated the specific properties of in idual time series. On current trajectories, results suggest that despite accelerating policy and management responses to the bio ersity crisis, the impacts of these efforts are unlikely to be reflected in improved trends in the state of bio ersity by 2020. We highlight areas of societal endeavor requiring additional efforts to achieve the Aichi Targets, and provide a baseline against which to assess future progress.
Publisher: Wiley
Date: 23-02-2016
DOI: 10.1111/CONL.12159
Publisher: The Royal Society
Date: 27-09-2011
Abstract: Current levels of endangerment and historical trends of species and habitats are the main criteria used to direct conservation efforts globally. Estimates of future declines, which might indicate different priorities than past declines, have been limited by the lack of appropriate data and models. Given that much of conservation is about anticipating and responding to future threats, our inability to look forward at a global scale has been a major constraint on effective action. Here, we assess the geography and extent of projected future changes in suitable habitat for terrestrial mammals within their present ranges. We used a global earth-system model, IMAGE, coupled with fine-scale habitat suitability models and parametrized according to four global scenarios of human development. We identified the most affected countries by 2050 for each scenario, assuming that no additional conservation actions other than those described in the scenarios take place. We found that, with some exceptions, most of the countries with the largest predicted losses of suitable habitat for mammals are in Africa and the Americas. African and North American countries were also predicted to host the most species with large proportional global declines. Most of the countries we identified as future hotspots of terrestrial mammal loss have little or no overlap with the present global conservation priorities, thus confirming the need for forward-looking analyses in conservation priority setting. The expected growth in human populations and consumption in hotspots of future mammal loss mean that local conservation actions such as protected areas might not be sufficient to mitigate losses. Other policies, directed towards the root causes of bio ersity loss, are required, both in Africa and other parts of the world.
Publisher: Elsevier BV
Date: 12-2014
Publisher: Cold Spring Harbor Laboratory
Date: 15-04-2020
DOI: 10.1101/2020.04.14.031716
Abstract: Despite the scientific consensus on the extinction crisis and its anthropogenic origin, the quantification of historical trends and of future scenarios of bio ersity and ecosystem services has been limited, due to the lack of inter-model comparisons and harmonized scenarios. Here, we present a multi-model analysis to assess the impacts of land-use and climate change from 1900 to 2050. During the 20th century provisioning services increased, but bio ersity and regulating services decreased. Similar trade-offs are projected for the coming decades, but they may be attenuated in a sustainability scenario. Future bio ersity loss from land-use change is projected to keep up with historical rates or reduce slightly, whereas losses due to climate change are projected to increase greatly. Renewed efforts are needed by governments to meet the 2050 vision of the Convention on Biological Diversity. Development pathways exist that allow for a reduction of the rates of bio ersity loss from land-use change and improvement in regulating services but climate change poses an increasing challenge.
Publisher: Wiley
Date: 13-12-2018
DOI: 10.1111/GEB.12856
Location: Netherlands
Location: Germany
No related grants have been discovered for Rob Alkemade.