scholarly journals Projections of suitable habitat for rare species under global warming scenarios

2010 ◽  
Vol 97 (6) ◽  
pp. 970-987 ◽  
Author(s):  
F. Thomas Ledig ◽  
Gerald E. Rehfeldt ◽  
Cuauhtémoc Sáenz-Romero ◽  
Celestino Flores-López
Keyword(s):  
Global Warming ◽  
Rare Species ◽  
Suitable Habitat

Going with the flow: global warming and the challenge of sustaining river ecosystems in monsoonal Asia

2007 ◽  
Vol 7 (2) ◽  
pp. 69-80 ◽  
Author(s):  
D. Dudgeon
Keyword(s):  
Global Warming ◽  
Human Impacts ◽  
Habitat Destruction ◽  
Dispersal Ability ◽  
Suitable Habitat ◽  
Hydrologic Alteration ◽  
Ecological Processes ◽  
Ecosystem Integrity ◽  
River Ecosystems ◽  
The Rich

River ecosystems in monsoonal Asia are experiencing human impacts to the detriment of the rich biodiversity they support. Threats include hydrologic alteration, pollution, habitat destruction, overexploitation, and invasive exotic species. Global warming will cause further changes to river ecosystems, and may act synergistically with other threat factors. Significant upward or northward range adjustments by the freshwater biota will be necessary to cope with rising temperatures, but there will be significant constraints upon dispersal ability and availability of suitable habitat for many organisms. Global warming will exacerbate existing impacts of hydrologic alteration because of the adaptive human responses that will be engendered by changes in climate and runoff, particularly dams constructed for hydropower generation, flood protection, water storage, and irrigation. The consequences of further hydrologic alteration and habitat fragmentation will be profound, since almost all ecological processes, material transfers and life-cycle events in the rivers of monsoonal Asia are mediated or controlled by flow. Thus a change in the timing or amounts of flow changes everything. Collaborative research to determine the environmental allocation of water flow needed to maintain ecosystem integrity and sustain biodiversity in the human-dominated rivers of monsoonal Asia should be a priority for ecologists, engineers and water-resource managers.

Identification of key environmental variables associated with the presence of Toothed Leionema (Leionema bilobum serrulatum) in the Strzelecki Ranges, Victoria, Australia

2011 ◽  
Vol 59 (3) ◽  
pp. 207
Author(s):  
Wendy Wright ◽  
Xuan Zhu ◽  
Mateusz Okurowski
Keyword(s):  
Environmental Factors ◽  
Habitat Suitability ◽  
Rare Species ◽  
Environmental Variables ◽  
Geographical Information Systems ◽  
Predictive Modelling ◽  
Geographical Information ◽  
Suitable Habitat ◽  
Small Tree ◽  
Disturbed Areas

Toothed Leionema is one of four subspecies of Leionema bilobum from the Rutaceae family. A dense shrub or small tree, growing to ~4 m high, it is a poorly investigated species which is considered rare in Victoria, Australia. This paper presents the results of a study using Geographical Information Systems and Weights-of-Evidence predictive modelling to assess the importance of seven environmental factors in determining habitat suitability for this species in the Strzelecki Ranges, Victoria. This method is particularly useful in understanding the distribution of rare species, especially where the ecology of the species of interest is not well understood. Of the seven environmental factors considered here, four were found to be important: elevation, aspect, distance to water and distance to plantation (disturbed) areas. The modelling results indicate that areas with elevations between 350 and 550 m and a dominant south-western aspect that are close to plantation areas (within 700 m), and to water (within 1100–1200 m), provide potentially suitable habitat for Toothed Leionema in the region.

scholarly journals Women and The Environment in The Arab World

1970 ◽  
pp. 3-4
Author(s):  
Randa Abul-Husn
Keyword(s):  
Global Warming ◽  
Rare Species ◽  
Arab World ◽  
Environmental Problems ◽  
Health Hazards ◽  
Global Awareness

A decade ago, nobody really worried about the environment, except for a few concerned environmentalists. Their repeated warnings against global warming, the various forms of pollution, the slow extinctions of rare species, health hazards and other environmental problems went without much notice. Global awareness rose only when the danger became real and the consequences were tangibly felt.

scholarly journals Predicting distributions of rare species: the case of the false coral snake Rhinobothryum bovallii (Serpentes: Colubridae)

2020 ◽  
Vol 19 (2) ◽  
pp. 141-164
Author(s):  
Fabio Leonardo Meza-Joya ◽  
Julián Andrés Rojas-Morales ◽  
Eliana Ramos
Keyword(s):  
Rare Species ◽  
Natural Habitat ◽  
Positive Association ◽  
Disjunct Distribution ◽  
Conservation Strategies ◽  
Suitable Habitat ◽  
Coral Snake ◽  
Distribution Models ◽  
Core Habitat ◽  
Precipitation Seasonality

Predicting distributions of rare species: the case of the false coral snake Rhinobothryum bovallii (Serpentes: Colubridae). Typically, the lack of enough high-quality occurrence data makes it diffcult to defne the geographic distribution of rare species. However, species distribution models provide a powerful tool for biodiversity management, including efforts to predict the distributions of rare species. Herein, new and historical data are used to model the distribution of the False Tree Coral snake, Rhinobothryum bovallii. The prediction map reveals a disjunct distribution for this species, from the Central American Isthmus to the northwestern portion of South America, with the species occupying lowlands and premontane forests below about 1500 m elevation. We identifed 491,516 km2 of suitable habitat for R. bovallii (minimum training presence threshold of 0.424) and 59,353 km2 of core habitat, with concentrations in three relatively isolated core areas (10-percentile training presence threshold of 0.396), as follow: (1) a “northern core” along the Pacifc and Caribbean coasts of Panama; (2) a “central core” in the Middle Magdalena Valley in Colombia; and (3) a “southern core” in the Ecuadorian Chocó. The occurrence of this species has a strong positive association with low precipitation seasonality, high precipitation in the warmest quarter, and low variability in annual temperature. Xeric and semiarid areas are unsuitable for this species and may pose environmental barriers limiting its distributional range. These results may lead to the discovery of additional populations of R. bovallii, identify priority survey areas, and by determining the extent of its natural habitat promote effective conservation strategies.

scholarly journals Predicting habitat suitability of Selaginella adunca A.Br. ex Hieron., an endangered and endemic fern-allies of Western Himalaya

2020 ◽  
Vol 7 (3) ◽  
pp. 547-552
Author(s):  
Amber Srivastava ◽  
Keyword(s):  
Habitat Suitability ◽  
Rare Species ◽  
Ecological Niche ◽  
Habitat Type ◽  
Western Himalaya ◽  
Suitable Habitat ◽  
Anthropogenic Pressure ◽  
Niche Modelling ◽  
Maxent Model ◽  
Preferred Habitat

Selaginella adunca is a quite distinct and rare species of Selaginella found in Western Himalaya. This species is reported only from few populations occurring in India and Nepal. Since most of its reported habitats are under anthropogenic pressure, therefore for proper conservation of this species it is necessary to mark the suitable habitat for its conservation and reintroduction. The present study was aimed to find out the suitable habitat of this species through ecological niche modelling (ENM) technique using Maxent model. This will also help in relocating the species in other preferred habitat type and its reintroduction as well.

scholarly journals What and where? Identifying high-risk aquatic invasive species and hotspots of suitable habitat in the Arctic

2018 ◽  
Author(s):  
Jesica Goldsmit ◽  
Chris Mckindsey ◽  
Philippe Archambault ◽  
Kimberly Howland
Keyword(s):  
Invasive Species ◽  
Global Warming ◽  
High Risk ◽  
Aquatic Invasive Species ◽  
The Arctic ◽  
Suitable Habitat ◽  
Resource Exploitation ◽  
Future Global Warming ◽  
Scale Modelling ◽  
Taxonomic Groups

The risk of aquatic invasive species (AIS) introductions in the Arctic is expected to increase with ongoing trends of greater shipping activity, resource exploitation, and climate warming in the region. We identified a suite of AIS (benthos, zooplankton and macroalgae) with the greatest likelihood of introduction and impact in the Canadian Arctic using the Canadian Marine Invasive Screening Tool. The top sixteen riskiest species (mainly benthic) were then modelled to predict the potential spatial distributions (habitat modelling using Maximum Entropy) at an Arctic scale. Modelling was conducted under present environmental conditions and under two future global warming scenarios (2050 and 2100). Results show that hotspots or regions where suitable habitat is more densely accumulated for modelled AIS are in the Hudson Complex, Chukchi / Eastern Bering Sea, and Barents / White Sea. Most taxonomic groups showed a trend for a positive poleward shift in the future, increasing from the present time to the end of the century. This approach will aid in the identification of present and future high-risk areas for AIS in response to global warming.

scholarly journals What and where? Identifying high-risk aquatic invasive species and hotspots of suitable habitat in the Arctic

2018 ◽  
Author(s):  
Jesica Goldsmit ◽  
Chris Mckindsey ◽  
Philippe Archambault ◽  
Kimberly Howland
Keyword(s):  
Invasive Species ◽  
Global Warming ◽  
High Risk ◽  
Aquatic Invasive Species ◽  
The Arctic ◽  
Suitable Habitat ◽  
Resource Exploitation ◽  
Future Global Warming ◽  
Scale Modelling ◽  
Taxonomic Groups

The risk of aquatic invasive species (AIS) introductions in the Arctic is expected to increase with ongoing trends of greater shipping activity, resource exploitation, and climate warming in the region. We identified a suite of AIS (benthos, zooplankton and macroalgae) with the greatest likelihood of introduction and impact in the Canadian Arctic using the Canadian Marine Invasive Screening Tool. The top sixteen riskiest species (mainly benthic) were then modelled to predict the potential spatial distributions (habitat modelling using Maximum Entropy) at an Arctic scale. Modelling was conducted under present environmental conditions and under two future global warming scenarios (2050 and 2100). Results show that hotspots or regions where suitable habitat is more densely accumulated for modelled AIS are in the Hudson Complex, Chukchi / Eastern Bering Sea, and Barents / White Sea. Most taxonomic groups showed a trend for a positive poleward shift in the future, increasing from the present time to the end of the century. This approach will aid in the identification of present and future high-risk areas for AIS in response to global warming.

Modelling ecosystem adaptation and dangerous rates of global warming

2019 ◽  
Vol 3 (2) ◽  
pp. 221-231 ◽  
Author(s):  
Rebecca Millington ◽  
Peter M. Cox ◽  
Jonathan R. Moore ◽  
Gabriel Yvon-Durocher
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Diffusion Rate ◽  
Individual Species ◽  
Genetic Evolution ◽  
Rates Of Change ◽  
Rapid Climate Change ◽  
Warming Climate ◽  
Intraspecies Competition ◽  
High Trait

Abstract We are in a period of relatively rapid climate change. This poses challenges for individual species and threatens the ecosystem services that humanity relies upon. Temperature is a key stressor. In a warming climate, individual organisms may be able to shift their thermal optima through phenotypic plasticity. However, such plasticity is unlikely to be sufficient over the coming centuries. Resilience to warming will also depend on how fast the distribution of traits that define a species can adapt through other methods, in particular through redistribution of the abundance of variants within the population and through genetic evolution. In this paper, we use a simple theoretical ‘trait diffusion’ model to explore how the resilience of a given species to climate change depends on the initial trait diversity (biodiversity), the trait diffusion rate (mutation rate), and the lifetime of the organism. We estimate theoretical dangerous rates of continuous global warming that would exceed the ability of a species to adapt through trait diffusion, and therefore lead to a collapse in the overall productivity of the species. As the rate of adaptation through intraspecies competition and genetic evolution decreases with species lifetime, we find critical rates of change that also depend fundamentally on lifetime. Dangerous rates of warming vary from 1°C per lifetime (at low trait diffusion rate) to 8°C per lifetime (at high trait diffusion rate). We conclude that rapid climate change is liable to favour short-lived organisms (e.g. microbes) rather than longer-lived organisms (e.g. trees).

When rare species become endangered: cryptic speciation in myrmecophilous hoverflies

2002 ◽  
Vol 76 (2) ◽  
pp. 315-315
Author(s):  
KARSTEN SCHONROGGE ◽  
BOYD BARR ◽  
JUDITH C. WARDLAW ◽  
EMMA NAPPER ◽  
MICHAEL G. GARDNER ◽  
...  
Keyword(s):  
Rare Species ◽  
Cryptic Speciation
Sign in / Sign up

Export Citation Format

Share Document