scholarly journals Ecosystem tipping points in an evolving world

2018 ◽  
Author(s):  
Vasilis Dakos ◽  
Blake Matthews ◽  
Andrew Hendry ◽  
Jonathan Levine ◽  
Nicolas Loeuille ◽  
...  
Keyword(s):  
Environmental Change ◽  
Tipping Points ◽  
Evolutionary Processes ◽  
Societal Costs ◽  
Evolutionary Changes ◽  
Ecological Shifts ◽  
Over Time

AbstractThere is growing concern over tipping points arising in ecosystems due to the crossing of environmental thresholds. Tipping points lead to strong and possibly irreversible shifts between alternative ecosystem states incurring high societal costs. Traits are central to the feedbacks that maintain alternative ecosystem states, as they govern the responses of populations to environmental change that could stabilize or destabilize ecosystem states. However, we know little about how evolutionary changes in trait distributions over time affect the occurrence of tipping points, and even less about how big scale ecological shifts reciprocally interact with trait dynamics. We argue that interactions between ecological and evolutionary processes should be taken into account for understanding the balance of feedbacks governing tipping points in nature.

scholarly journals Fast environmental change and eco-evolutionary feedbacks can drive regime shifts in ecosystems before tipping points are crossed

2021 ◽  
Vol 288 (1955) ◽  
pp. 20211192
Author(s):  
P. Catalina Chaparro-Pedraza
Keyword(s):  
Environmental Change ◽  
Environmental Changes ◽  
Phenotypic Diversity ◽  
Stable State ◽  
Regime Shifts ◽  
Tipping Points ◽  
Evolutionary Processes ◽  
Alternative Stable State ◽  
Management Measures ◽  
The Difference

Anthropogenic environmental changes are altering ecological and evolutionary processes of ecosystems. The possibility that ecosystems can respond abruptly to gradual environmental change when critical thresholds are crossed (i.e. tipping points) and shift to an alternative stable state is a growing concern. Here I show that fast environmental change can trigger regime shifts before environmental stress exceeds a tipping point in evolving ecological systems. The difference in the time scales of coupled ecological and evolutionary processes makes ecosystems sensitive not only to the magnitude of environmental changes, but also to the rate at which changes are imposed. Fast evolutionary change mediated by high trait variation can reduce the sensitivity of ecosystems to the rate of environmental change and prevent the occurrence of rate-induced regime shifts. This suggests that management measures to prevent rate-induced regime shifts should focus on mitigating the effects of environmental change and protecting phenotypic diversity in ecosystems.

Social Change and Psychological Change in Rural Mali

2016 ◽  
Vol 52 (7) ◽  
pp. 965-981 ◽  
Author(s):  
Carmi Schooler ◽  
Leslie J Caplan ◽  
Pakuy Pierre Mounkoro ◽  
Chiaka Diakité
Keyword(s):  
Social Change ◽  
Environmental Change ◽  
Environmental Conditions ◽  
Economic Hardship ◽  
Psychological Change ◽  
Self Confidence ◽  
Personality Stability ◽  
Psychological Reaction ◽  
Using Data ◽  
Over Time

We examine the effects of socio-environmental change on personality in Mali in three ways, using data from a longitudinal two-wave (1994, 2004) survey conducted in rural Mali. Firstly, we compare the between-wave personality stability of Anxiety, Self-confidence, Mastery/Fatalism, and Authoritarianism with that in USA, Japan, Poland, and Ukraine. Secondly, we examine socio-economic hardship and political instability in pre-industrial Mali. Thirdly, we examine patterns of psychological reaction to political and social change during the study period. Our findings have implications for comparisons and generalizations across times and cultures about the contribution of socio-environmental conditions to over-time change in personality.

scholarly journals Production dynamics reveal hidden overharvest of inland recreational fisheries

2019 ◽  
Vol 116 (49) ◽  
pp. 24676-24681 ◽  
Author(s):  
Holly S. Embke ◽  
Andrew L. Rypel ◽  
Stephen R. Carpenter ◽  
Greg G. Sass ◽  
Derek Ogle ◽  
...  
Keyword(s):  
Environmental Change ◽  
Developed Countries ◽  
Recreational Fisheries ◽  
Biomass Harvest ◽  
Fish Stocks ◽  
Biomass Turnover ◽  
Main Fraction ◽  
Rapid Pace ◽  
Production Dynamics ◽  
Over Time

Recreational fisheries are valued at $190B globally and constitute the predominant way in which people use wild fish stocks in developed countries, with inland systems contributing the main fraction of recreational fisheries. Although inland recreational fisheries are thought to be highly resilient and self-regulating, the rapid pace of environmental change is increasing the vulnerability of these fisheries to overharvest and collapse. Here we directly evaluate angler harvest relative to the biomass production of individual stocks for a major inland recreational fishery. Using an extensive 28-y dataset of the walleye (Sander vitreus) fisheries in northern Wisconsin, United States, we compare empirical biomass harvest (Y) and calculated production (P) and biomass (B) for 390 lake year combinations. Production overharvest occurs when harvest exceeds production in that year. Biomass and biomass turnover (P/B) declined by ∼30 and ∼20%, respectively, over time, while biomass harvest did not change, causing overharvest to increase. Our analysis revealed that ∼40% of populations were production-overharvested, a rate >10× higher than estimates based on population thresholds often used by fisheries managers. Our study highlights the need to adapt harvest to changes in production due to environmental change.

scholarly journals Increased Stopover Duration and Low Body Condition of the Pied Flycatcher (Ficedula hypoleuca) at an Autumn Stopover Site

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2208
Author(s):  
Bernice Goffin ◽  
Marcial Felgueiras ◽  
Anouschka R. Hof
Keyword(s):  
Environmental Change ◽  
Body Condition ◽  
Environmental Conditions ◽  
Ficedula Hypoleuca ◽  
Autumn Migration ◽  
Long Distance ◽  
Stopover Site ◽  
Stopover Duration ◽  
Stopover Sites ◽  
Over Time

Many long-distance migratory bird species are in decline, of which environmental changes, such as climate change and land-use changes, are thought to be important drivers. The effects of environmental change on the migration of these birds have often been studied during spring migration. Fewer studies have explored the impacts of environmental change on autumn migration, especially at stopover sites. However, stopover sites are important, as the quality of these sites is expected to change over time. We investigated impacts of local environmental conditions on the migration strategy and body condition of the Pied Flycatcher (Ficedula hypoleuca) at an autumn migration stopover site using long-term ringing data (1996–2018) and local environmental conditions. We found that although the arrival and departure dates of birds at the stopover site remained unchanged, the body condition (fat score) of the individuals caught decreased, and the stopover duration increased. This suggests that conditions at the stopover site during the autumn migration period have deteriorated over time. This study emphasizes the importance of suitable stopover sites for migratory birds and stresses that changes in environmental conditions during the autumn migration period may be contributing to the current decline in long-distance migratory passerines.

Challenges to Traditional International Relations Theory Posed by Environmental Change

2010 ◽  
Author(s):  
Hugh Dyer
Keyword(s):  
International Relations ◽  
Environmental Change ◽  
Subject Matter ◽  
International Relations Theory ◽  
The World ◽  
Practical Challenge ◽  
The Subject ◽  
Over Time

Changes in the environment can impact international relations theory, despite enjoying only a limited amount of attention from scholars of the discipline. The sorts of influence that may be identified include ontology, epistemology, concepts, and methods, all of these being related to varying perspectives on international relations. It is likely that the most profound implications arise at the ontological level, since this establishes assumptions about, for example, whether the world we wish to understand is both political and ecological. However, more recently the recognition of the practical challenge presented by the environment has become widespread, though it has not yet translated into a significant impact on the discipline of international relations, even when theoretical implications are noted. It is now almost obligatory to include the environment in any list of modern international relations concerns, as over time it has become necessary to include peace, underdevelopment, gender, or race, as they quite rightly became recognized as significant aspects of the field. Moreover, the environment, as a relatively novel subject matter, has naturally brought some critique and innovation to the field. However, studies of the environment are also subject to such descriptors as “mainstream” and “radical” in debates about how best to tackle the subject. As is often the case, the debates are sharpest among those with the greatest interest in the subject.

scholarly journals The importance of offshore origination revealed through ophiuroid phylogenomics

2017 ◽  
Vol 284 (1858) ◽  
pp. 20170160 ◽  
Author(s):  
Guadalupe Bribiesca-Contreras ◽  
Heroen Verbruggen ◽  
Andrew F. Hugall ◽  
Timothy D. O'Hara
Keyword(s):  
Deep Sea ◽  
Marine Invertebrates ◽  
Range Shift ◽  
Evolutionary Adaptation ◽  
Evolutionary Processes ◽  
Opposite Pattern ◽  
Bathymetric Range ◽  
Evolutionary Pattern ◽  
Transitional State ◽  
Over Time

Our knowledge of macro-evolutionary processes in the deep sea is poor, leading to much speculation about whether the deep sea is a source or sink of evolutionary adaptation. Here, we use a phylogenetic approach, on large molecular (688 species, 275 kbp) and distributional datasets (104 513 records) across an entire class of marine invertebrates (Ophiuroidea), to infer rates of bathymetric range shift over time between shallow and deep water biomes. Biome conservation is evident through the phylogeny, with the majority of species in most clades distributed within the same bathome. Despite this, bathymetric shifts have occurred. We inferred from ancestral reconstructions that eurybathic or intermediate distributions across both biomes were a transitional state and direct changes between shallow and deep sea did not occur. The macro-evolutionary pattern of bathome shift appeared to reflect micro-evolutionary processes of bathymetric speciation. Results suggest that most of the oldest clades have a deep-sea origin, but multiple colonization events indicate that the evolution of this group conforms neither to a simple onshore–offshore hypothesis, nor the opposite pattern. Both shallow and deep bathomes have played an important role in generating the current diversity of this major benthic class.

Urban Evolutionary Biology

2020 ◽  
Keyword(s):  
Urban Space ◽  
Evolutionary Biology ◽  
Current Knowledge ◽  
Social Characteristics ◽  
Urban Habitat ◽  
Evolutionary Processes ◽  
Urban Neighbourhoods ◽  
Evolutionary Changes ◽  
Research Themes ◽  
New Research

Cities occupy about 3 per cent of the Earth’s habitable land area and are home to one out of two humans worldwide; both estimates are predicted to grow. Urban space is thus becoming an important, novel ecological niche for humans and wildlife alike. Building on knowledge gathered by urban ecologists during the last half century, evidence of evolutionary responses to urbanization has rapidly emerged. Urban evolutionary biology is a nascent yet fast-growing field of research—and a fascinating testing ground for evolutionary biologists worldwide. Urbanization offers a great range of opportunities to examine evolutionary processes because of the radically altered and easily quantifiable urban habitat, and the large number of cities worldwide, enabling rigorous, replicated tests of evolutionary hypotheses. Urban populations are increasingly exhibiting both neutral and adaptive evolutionary changes at levels ranging from genotypes to phenotypes. The novelty of urban evolutionary biology is that these changes are driven by the cities we have built, including effects of infrastructure, pollution, and social characteristics of our urban neighbourhoods. It will thereby enrich the field of evolutionary biology with emergent yet incredibly potent new research themes where the urban habitat is key. In a series of sixteen chapters written by leading evolutionary biologists working on urban drivers of evolution, Urban Evolutionary Biology is the first academic book in the field. It synthesizes current knowledge on evolutionary processes occurring literally on our doorstep, across the globe, and in each city independently.

Geographical differences in competitive hierarchy in a native–invasive system

2020 ◽  
Vol 131 (3) ◽  
pp. 632-646
Author(s):  
Eudald Pujol-Buxó ◽  
Antigoni Kaliontzopoulou ◽  
Gerezti Unanue-Goikoetxea ◽  
Bàrbara Ambrós ◽  
Gustavo A Llorente
Keyword(s):  
Invasive Species ◽  
Adaptive Responses ◽  
Rapid Adaptation ◽  
Geographical Differences ◽  
Evolutionary Changes ◽  
Good Target ◽  
Ecological Shifts ◽  
Novel Interactions ◽  
Native Invasive ◽  
Plastic Responses

Abstract Biological invasions can create novel competitive interactions and force ecological shifts in both native and invasive species. Anuran tadpoles are able to modify their behaviour, morphology, growth and development to cope with competitive pressure. This plasticity is a good target for natural selection and can drive rapid evolutionary changes in response to novel interactions. Here, we explore changes in plastic responses and fitness of competing invasive and native tadpoles by exposing tadpoles from different locations with contrasting evolutionary histories to the same set of varied competitive conditions. Eggs were collected from one site near the first introduction of the invasive frog (~110 years of coexistence) and from a second site that was invaded recently. We hypothesized less favourable outcomes for the invasive species in long-coexisting populations, where the native competitor might have developed adaptive responses. Most results support the hypothesis. Where the invasion was older, invasive tadpoles exposed to native competitors grew less, developed more slowly and displayed morphologies linked to competitive stress, whereas the developmental stability and canalization of native tadpoles increased. On the whole, the asymmetric competitive relationship thus appeared to approach symmetry after ~35 generations, highlighting a noteworthy example of rapid adaptation after an invasion.

A History of EI/ECSE in the United States: A Personal Perspective

2018 ◽  
Vol 40 (2) ◽  
pp. 121-137 ◽  
Author(s):  
Diane Bricker ◽  
Huichao Xie ◽  
Sharon Bohjanen
Keyword(s):  
United States ◽  
Early Childhood ◽  
Early Intervention ◽  
Early Childhood Special Education ◽  
The United States ◽  
Personal Perspective ◽  
Evolutionary Changes ◽  
History Of ◽  
Growth And Change ◽  
Over Time

This article offers a view of the evolution of Early Intervention/Early Childhood Special Education (EI/ECSE) in the United States. This view of the field’s growth and change over time reflects the personal memories, experiences, and perspectives of Diane Bricker, who reviews the evolutionary changes in EI/ECSE based on her experiences with a range of theorists, scientists, and clinicians who affected the EI/ECSE profession both directly and indirectly. The challenge of succinctly summarizing the history of EI/ECSE required Bricker to make many difficult choices and prohibited recognizing many important contributors and events over the years. The following narrative of her presentation provides a powerful backdrop for the future of the field.

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