scholarly journals Genomic basis and evolutionary potential for extreme drought adaptation in Arabidopsis thaliana

2017 ◽  
Author(s):  
Moises Exposito-Alonso ◽  
François Vasseur ◽  
Wei Ding ◽  
George Wang ◽  
Hernán A. Burbano ◽  
...  
Keyword(s):  
Climate Change ◽  
Arabidopsis Thaliana ◽  
Genetic Variants ◽  
Population Decline ◽  
Extreme Drought ◽  
Drought Event ◽  
Evolutionary Potential ◽  
Change Models ◽  
Standing Variation ◽  
Evolutionary Response

Because earth is currently experiencing unprecedented climate change, it is important to predict how species will respond to it. However, geographically-explicit predictive studies frequently ignore that species are comprised of genetically diverse individuals that can vary in their degree of adaptation to extreme local environments; properties that will determine the species’ ability to withstand climate change. Because an increase in extreme drought events is expected to challenge plant communities with global warming, we carried out a greenhouse experiment to investigate which genetic variants predict surviving an extreme drought event and how those variants are distributed across Eurasian Arabidopsis thaliana individuals. Genetic variants conferring higher drought survival showed signatures of polygenic adaptation, and were more frequently found in Mediterranean and Scandinavian regions. Using geoenvironmental models, we predicted that Central European populations might lag behind in adaptation by the end of the 21st century. Further analyses showed that a population decline could nevertheless be compensated by natural selection acting efficiently over standing variation or by migration of adapted individuals from populations at the margins of the species’ distribution. These findings highlight the importance of within-species genetic heterogeneity in facilitating an evolutionary response to a changing climate.One-sentence summary“Future genetic changes in A. thaliana populations can be forecast by combining climate change models with genomic predictions based on experimental phenotypic data.”

scholarly journals Genomic basis and evolutionary potential for extreme drought adaptation in Arabidopsis thaliana

2017 ◽  
Vol 2 (2) ◽  
pp. 352-358 ◽  
Author(s):  
Moises Exposito-Alonso ◽  
François Vasseur ◽  
Wei Ding ◽  
George Wang ◽  
Hernán A. Burbano ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Extreme Drought ◽  
Evolutionary Potential ◽  
Drought Adaptation ◽  
Genomic Basis

scholarly journals Precipitation and vegetation shape patterns of genomic and craniometric variation in the central African rodent Praomys misonnei

2020 ◽  
Vol 287 (1930) ◽  
pp. 20200449
Author(s):  
Katy Morgan ◽  
Jean-François Mboumba ◽  
Stephan Ntie ◽  
Patrick Mickala ◽  
Courtney A. Miller ◽  
...  
Keyword(s):  
Climate Change ◽  
Genomic Variation ◽  
Conservation Strategies ◽  
Future Climate Change ◽  
Climate Change Scenarios ◽  
Evolutionary Potential ◽  
Standing Variation ◽  
Craniometric Variation ◽  
Ecological Transition ◽  
Effective Conservation

Predicting species' capacity to respond to climate change is an essential first step in developing effective conservation strategies. However, conservation prioritization schemes rarely take evolutionary potential into account. Ecotones provide important opportunities for diversifying selection and may thus constitute reservoirs of standing variation, increasing the capacity for future adaptation. Here, we map patterns of environmentally associated genomic and craniometric variation in the central African rodent Praomys misonnei to identify areas with the greatest turnover in genomic composition. We also project patterns of environmentally associated genomic variation under future climate change scenarios to determine where populations may be under the greatest pressure to adapt. While precipitation gradients influence both genomic and craniometric variation, vegetation structure is also an important determinant of craniometric variation. Areas of elevated environmentally associated genomic and craniometric variation overlap with zones of rapid ecological transition underlining their importance as reservoirs of evolutionary potential. We also find that populations in the Sanaga river basin, central Cameroon and coastal Gabon are likely to be under the greatest pressure from climate change. Lastly, we make specific conservation recommendations on how to protect zones of high evolutionary potential and identify areas where populations may be the most susceptible to climate change.

scholarly journals Predicting the evolutionary dynamics of seasonal adaptation to novel climates in Arabidopsis thaliana

2016 ◽  
Vol 113 (20) ◽  
pp. E2812-E2821 ◽  
Author(s):  
Alexandre Fournier-Level ◽  
Emily O. Perry ◽  
Jonathan A. Wang ◽  
Peter T. Braun ◽  
Andrew Migneault ◽  
...  
Keyword(s):  
Climate Change ◽  
Arabidopsis Thaliana ◽  
Genetic Basis ◽  
Evolutionary Dynamics ◽  
Winter Warming ◽  
Standing Variation ◽  
Rapid Climate Change ◽  
Increased Temperature ◽  
Temperature Climate ◽  
Reference Climate

Predicting whether and how populations will adapt to rapid climate change is a critical goal for evolutionary biology. To examine the genetic basis of fitness and predict adaptive evolution in novel climates with seasonal variation, we grew a diverse panel of the annual plant Arabidopsis thaliana (multiparent advanced generation intercross lines) in controlled conditions simulating four climates: a present-day reference climate, an increased-temperature climate, a winter-warming only climate, and a poleward-migration climate with increased photoperiod amplitude. In each climate, four successive seasonal cohorts experienced dynamic daily temperature and photoperiod variation over a year. We measured 12 traits and developed a genomic prediction model for fitness evolution in each seasonal environment. This model was used to simulate evolutionary trajectories of the base population over 50 y in each climate, as well as 100-y scenarios of gradual climate change following adaptation to a reference climate. Patterns of plastic and evolutionary fitness response varied across seasons and climates. The increased-temperature climate promoted genetic divergence of subpopulations across seasons, whereas in the winter-warming and poleward-migration climates, seasonal genetic differentiation was reduced. In silico “resurrection experiments” showed limited evolutionary rescue compared with the plastic response of fitness to seasonal climate change. The genetic basis of adaptation and, consequently, the dynamics of evolutionary change differed qualitatively among scenarios. Populations with fewer founding genotypes and populations with genetic diversity reduced by prior selection adapted less well to novel conditions, demonstrating that adaptation to rapid climate change requires the maintenance of sufficient standing variation.

scholarly journals Limited evolutionary rescue of locally adapted populations facing climate change

2013 ◽  
Vol 368 (1610) ◽  
pp. 20120083 ◽  
Author(s):  
Katja Schiffers ◽  
Elizabeth C. Bourne ◽  
Sébastien Lavergne ◽  
Wilfried Thuiller ◽  
Justin M. J. Travis
Keyword(s):  
Climate Change ◽  
Gene Flow ◽  
Habitat Heterogeneity ◽  
Climatic Conditions ◽  
Spatially Explicit ◽  
Evolutionary Potential ◽  
Evolutionary Response ◽  
Evolutionary Rescue ◽  
The Impact ◽  
Rapid Environmental Change

Dispersal is a key determinant of a population's evolutionary potential. It facilitates the propagation of beneficial alleles throughout the distributional range of spatially outspread populations and increases the speed of adaptation. However, when habitat is heterogeneous and individuals are locally adapted, dispersal may, at the same time, reduce fitness through increasing maladaptation. Here, we use a spatially explicit, allelic simulation model to quantify how these equivocal effects of dispersal affect a population's evolutionary response to changing climate. Individuals carry a diploid set of chromosomes, with alleles coding for adaptation to non-climatic environmental conditions and climatic conditions, respectively. Our model results demonstrate that the interplay between gene flow and habitat heterogeneity may decrease effective dispersal and population size to such an extent that substantially reduces the likelihood of evolutionary rescue. Importantly, even when evolutionary rescue saves a population from extinction, its spatial range following climate change may be strongly narrowed, that is, the rescue is only partial. These findings emphasize that neglecting the impact of non-climatic, local adaptation might lead to a considerable overestimation of a population's evolvability under rapid environmental change.

scholarly journals A map of climate change-driven natural selection in Arabidopsis thaliana

2018 ◽  
Author(s):  
Moises Exposito-Alonso ◽  
Hernán A. Burbano ◽  
Oliver Bossdorf ◽  
Rasmus Nielsen ◽  
Detlef Weigel ◽  
...  
Keyword(s):  
Climate Change ◽  
Arabidopsis Thaliana ◽  
Natural Selection ◽  
Local Adaptation ◽  
Genetic Variants ◽  
Species Range ◽  
Genome Wide ◽  
Genetic Makeup ◽  
Environmental Limits ◽  
Genome Information

Through the lens of evolution, climate change is an agent of natural selection that forces populations to change and adapt, or face extinction. Current assessments of the risk of biodiversity associated with climate change1, however, do not typically take into account the genetic makeup of populations and how natural selection impacts it2. We made use of the extensive genome information in Arabidopsis thaliana and measured how rainfall-manipulation affected the fitness of 517 natural lines grown in Spain and Germany. This allowed us to directly infer selection along the genome3. Natural selection was particularly strong in the hot-dry Spanish location, killing 63% of lines and significantly changing the frequency of ~5% of all genome-wide variants. A significant portion of this climate-driven natural selection over variants was predictable from signatures of local adaptation (R2=29-52%), as genetic variants found in geographic areas with climates more similar to the experimental sites were positively selected. Field-validated predictions across the species range indicated that Mediterranean and Western Siberian populations — at the edges of the species’ environmental limits — currently experience the strongest climate-driven selection. With more frequent droughts and rising temperatures in Europe4, we forecast an increase in directional natural selection moving northwards from the southern end, and putting many native A. thaliana populations at evolutionary risk.

scholarly journals Impact of Extreme Drought Climate on Water Security in North Borneo: Case Study of Sabah

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1135
Author(s):  
Carolyn Payus ◽  
Lim Ann Huey ◽  
Farrah Adnan ◽  
Andi Besse Rimba ◽  
Geetha Mohan ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Resource ◽  
Supply And Demand ◽  
Water Security ◽  
Water Levels ◽  
Extreme Drought ◽  
Northeast Monsoon ◽  
Water Insecurity ◽  
The North ◽  
North Borneo

For countries in Southeast Asia that mainly rely on surface water as their water resource, changes in weather patterns and hydrological systems due to climate change will cause severely decreased water resource availability. Warm weather triggers more water use and exacerbates the extraction of water resources, which will change the operation patterns of water usage and increase demand, resulting in water scarcity. The occurrence of prolonged drought upsets the balance between water supply and demand, significantly increasing the vulnerability of regions to damaging impacts. The objectives of this study are to identify trends and determine the impacts of extreme drought events on water levels for the major important water dams in the northern part of Borneo, and to assess the risk of water insecurity for the dams. In this context, remote sensing images are used to determine the degree of risk of water insecurity in the regions. Statistical methods are used in the analysis of daily water levels and rainfall data. The findings show that water levels in dams on the North and Northeast Coasts of Borneo are greatly affected by the extreme drought climate caused by the Northeast Monsoon, with mild to the high risk recorded in terms of water insecurity, with only two of the water dams being water-secure. This study shows how climate change has affected water availability throughout the regions.

The effects of extreme drought on climate change beliefs, risk perceptions, and adaptation attitudes

2015 ◽  
Vol 135 (2) ◽  
pp. 211-226 ◽  
Author(s):  
J. Stuart Carlton ◽  
Amber S. Mase ◽  
Cody L. Knutson ◽  
Maria Carmen Lemos ◽  
Tonya Haigh ◽  
...  
Keyword(s):  
Climate Change ◽  
Risk Perceptions ◽  
Extreme Drought ◽  
Change Beliefs

scholarly journals CLIMATE CHANGE IMPACT ON MOUNTAIN BIODIVERSITY: A SPECIAL REFERENCE TO GILGIT-BALTISTAN OF PAKISTAN

2016 ◽  
Vol 1 ◽  
pp. 53
Author(s):  
S. Ishaq ◽  
M. Z. Khan ◽  
F. Begum ◽  
K. Hussain ◽  
R. Amir ◽  
...  
Keyword(s):  
Climate Change ◽  
Natural Resources ◽  
Special Reference ◽  
Current Knowledge ◽  
Knowledge Gap ◽  
Change Models ◽  
Impact Of Climate Change ◽  
The Government ◽  
Gilgit Baltistan ◽  
The Impact

Climate Change is not a stationary phenomenon; it moves from time to time, it represents a major threat to mountainous biodiversity and to ecosystem integrity. The present study is an attempt to identify the current knowledge gap and the effects of climate change on mountainous biodiversity, a special reference to the Gilgit-Baltistan is briefly reviewed. Measuring the impact of climate change on mountain biodiversity is quite challenging, because climate change interacts with every phenomenon of ecosystem. The scale of this change is so large and very adverse so strongly connected to ecosystem services, and all communities who use natural resources. This study aims to provide the evidences on the basis of previous literature, in particular context to mountain biodiversity of Gilgit-Baltistan (GB). Mountains of Gilgit-Baltistan have most fragile ecosystem and are more vulnerable to climate change. These mountains host variety of wild fauna and flora, with many endangered species of the world. There are still many gaps in our knowledge of literature we studied because very little research has been conducted in Gilgit-Baltistan about climate change particular to biodiversity. Recommendations are made for increased research efforts in future this including jointly monitoring programs, climate change models and ecological research. Understanding the impact of climate change particular to biodiversity of GB is very important for sustainable management of these natural resources. The Government organizations, NGOs and the research agencies must fill the knowledge gap, so that it will help them for policy making, which will be based on scientific findings and research based.

Sign in / Sign up

Export Citation Format

Share Document