scholarly journals Considering habitat conversion and fragmentation in characterisation factors for land-use impacts on vertebrate species richness

2021 ◽  
pp. 149737
Author(s):  
Koen J.J. Kuipers ◽  
Roel May ◽  
Francesca Verones
Keyword(s):  
Land Use ◽  
Species Richness ◽  
Vertebrate Species ◽  
Land Use Impacts ◽  
Habitat Conversion ◽  
Characterisation Factors

scholarly journals Integrating Climate Change and Land Use Impacts to Explore Forest Conservation Policy

2017 ◽  
Author(s):  
Hyeyeong Choe ◽  
James H. Thorne
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Species Richness ◽  
Forest Policy ◽  
Forest Conversion ◽  
Climate Projections ◽  
Climate Change Scenarios ◽  
Land Use Impacts ◽  
Current Time ◽  
Future Policy

A scenario-based approach to the impacts of land use and climate change can help in identifying future policy directions. This study models the impacts of different land use and climate change scenarios on the forest ecosystems of South Korea to identify national-scale forest policy options. Climatically suitable forest areas for 1,031 climate vulnerable plant species were identified for current time and for 2050. We calculated change in species richness under four climate projections. We built forest conversion models and created four 2050 forest scenarios: (1) forest loss continues at current rates; (2) similar loss, but with conservation in areas with suitable future climates; (3) a reduction of loss by 50%; and (4) a combination of preservation and overall reduction of loss by 50%. We then crossed the forest conversion models with the climate-driven change in species richness, and categorized current forest areas into four classes to offer forest policy alternatives. By deploying the scenarios which preserve climatically suitable forests, the average species richness where forests converting to other land uses reduced significantly. We suggest conserving forests with suitable climates for biodiversity conservation and the establishment of forest plantations targeted to areas where species richness will decline based on our results.

scholarly journals Evaluating Biodiversity Metric Response to Forecasted Land Use Change in the Northern Rio Grande Basin

Environments ◽  
2018 ◽  
Vol 5 (8) ◽  
pp. 91
Author(s):  
Elizabeth Samson ◽  
Kenneth Boykin ◽  
William Kepner ◽  
Mark Andersen ◽  
Alexander Fernald
Keyword(s):  
Land Use ◽  
Species Richness ◽  
Land Use Change ◽  
Rio Grande ◽  
Vertebrate Species ◽  
Housing Density ◽  
Habitat Models ◽  
Terrestrial Vertebrate ◽  
Land Use Scenarios ◽  
Northern Rio Grande

The effects of future land use change on arid and semi-arid watersheds in the American Southwest have important management implications. Seamless, national-scale land-use-change scenarios for developed land were acquired from the US Environmental Protection Agency Integrated Climate and Land Use Scenarios (lCLUS) project and extracted to fit the Northern Rio Grande River Basin, New Mexico relative to projections of housing density for the period from 2000 through 2100. Habitat models developed from the Southwest Regional Gap Analysis Project were invoked to examine changes in wildlife habitat and biodiversity metrics using five ICLUS scenarios. The scenarios represent a US Census base-case and four modifications that were consistent with the different assumptions underlying the A1, A2, B1, and B2 Intergovernmental Panel on Climate Change global greenhouse gas emission storylines. Habitat models for terrestrial vertebrate species were used to derive metrics reflecting ecosystem services or biodiversity aspects valued by humans that could be quantified and mapped. Example metrics included total terrestrial vertebrate species richness, bird species richness, threatened and endangered species, and harvestable species (e.g., waterfowl, big game). Overall, the defined scenarios indicated that the housing density and extent of developed lands will increase throughout the century with a resultant decrease in area for all species richness categories. The A2 Scenario, in general, showed greatest effect on area by species richness category. The integration of the land use scenarios with biodiversity metrics derived from deductive habitat models may prove to be an important tool for decision makers involved in impact assessments and adaptive planning processes.

scholarly journals Integrating climate change and land use impacts to explore forest conservation policy

2017 ◽  
Author(s):  
Hyeyeong Choe
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Species Richness ◽  
Forest Policy ◽  
Forest Conversion ◽  
Climate Projections ◽  
Climate Change Scenarios ◽  
Land Use Impacts ◽  
Current Time ◽  
Future Policy

A scenario-based approach to the impacts of land use and climate change can help in identifying future policy directions. This study models the impacts of different land use and climate change scenarios on the forest ecosystems of South Korea to identify national-scale forest policy options. Climatically suitable forest areas for 1,031 climate vulnerable plant species were identified for current time and for 2050. We calculated change in species richness under four climate projections. We built forest conversion models and created four 2050 forest scenarios: (1) forest loss continues at current rates; (2) similar loss, but with conservation in areas with suitable future climates; (3) a reduction of loss by 50%; and (4) a combination of preservation and overall reduction of loss by 50%. We then crossed the forest conversion models with the climate-driven change in species richness, and categorized current forest areas into four classes to offer forest policy alternatives. By deploying the scenarios which preserve climatically suitable forests, the average species richness where forests converting to other land uses reduced significantly. We suggest conserving forests with suitable climates for biodiversity conservation and the establishment of forest plantations targeted to areas where species richness will decline based on our results.

Climate and land‐use change severity alter trait‐based responses to habitat conversion

2021 ◽  
Vol 30 (3) ◽  
pp. 598-610
Author(s):  
Alexander H. Murray ◽  
A. Justin Nowakowski ◽  
Luke O. Frishkoff
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Habitat Conversion

scholarly journals Changing Land Use and Population Density Are Degrading Water Quality in the Lower Mekong Basin

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1948
Author(s):  
Flavia Tromboni ◽  
Thomas E. Dilts ◽  
Sarah E. Null ◽  
Sapana Lohani ◽  
Peng Bun Ngor ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Population Density ◽  
Local Population ◽  
Reference Conditions ◽  
Mekong River ◽  
Land Use Impacts ◽  
Wet Season ◽  
Mekong Basin ◽  
Lower Mekong Basin

Establishing reference conditions in rivers is important to understand environmental change and protect ecosystem integrity. Ranked third globally for fish biodiversity, the Mekong River has the world’s largest inland fishery providing livelihoods, food security, and protein to the local population. It is therefore of paramount importance to maintain the water quality and biotic integrity of this ecosystem. We analyzed land use impacts on water quality constituents (TSS, TN, TP, DO, NO3−, NH4+, PO43−) in the Lower Mekong Basin. We then used a best-model regression approach with anthropogenic land-use as independent variables and water quality parameters as the dependent variables, to define reference conditions in the absence of human activities (corresponding to the intercept value). From 2000–2017, the population and the percentage of crop, rice, and plantation land cover increased, while there was a decrease in upland forest and flooded forest. Agriculture, urbanization, and population density were associated with decreasing water quality health in the Lower Mekong Basin. In several sites, Thailand and Laos had higher TN, NO3−, and NH4+ concentrations compared to reference conditions, while Cambodia had higher TP values than reference conditions, showing water quality degradation. TSS was higher than reference conditions in the dry season in Cambodia, but was lower than reference values in the wet season in Thailand and Laos. This study shows how deforestation from agriculture conversion and increasing urbanization pressure causes water quality decline in the Lower Mekong Basin, and provides a first characterization of reference water quality conditions for the Lower Mekong River and its tributaries.

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