Abalone populations are most sensitive to environmental stress effects on adult individuals

2020 ◽  
Vol 643 ◽  
pp. 75-85
Author(s):  
EA Aalto ◽  
JP Barry ◽  
CA Boch ◽  
SY Litvin ◽  
F Micheli ◽  
...  
Keyword(s):  
Climate Change ◽  
Larval Survival ◽  
Fertilization Success ◽  
Equilibrium Density ◽  
Life Stages ◽  
Stress Effects ◽  
Size Dependent ◽  
Dependent Model ◽  
Negative Impacts ◽  
Population Structure And Dynamics

Marine organisms are exposed to stressors associated with climate change throughout their life cycle, but a majority of studies focus on responses in single life stages, typically early ones. Here, we examined how negative impacts from stressors associated with climate change, ocean acidification, and pollution can act across multiple life stages to influence long-term population dynamics and decrease resilience to mass mortality events. We used a continuous-size-structured density-dependent model for abalone (Haliotis spp.), calcifying mollusks that support valuable fisheries, to explore the sensitivity of stock abundance and annual catch to potential changes in growth, survival, and fecundity across the organism’s lifespan. Our model predicts that decreased recruitment from lowered fertilization success or larval survival has small negative impacts on the population, and that stock size and fishery performance are much more sensitive to changes in parameters that affect the size or survival of adults. Sensitivity to impacts on subadults and juveniles is also important for the population, though less so than for adults. Importantly, likelihood of recovery following mortality events showed more pronounced sensitivity to most possible parameter impacts, greater than the effects on equilibrium density or catch. Our results suggest that future experiments on environmental stressors should focus on multiple life stages to capture effects on population structure and dynamics, particularly for species with size-dependent fecundity.

A size-dependent model for shear deformable laminated micro-nano plates based on couple stress theory

2021 ◽  
Vol 259 ◽  
pp. 113457
Author(s):  
Zanhang He ◽  
Jianghong Xue ◽  
Sishi Yao ◽  
Yongfu Wu ◽  
Fei Xia
Keyword(s):  
Couple Stress ◽  
Couple Stress Theory ◽  
Stress Theory ◽  
Size Dependent ◽  
Dependent Model ◽  
Shear Deformable

scholarly journals Debris Flows Occurrence in the Semiarid Central Andes under Climate Change Scenario

Geosciences ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 43
Author(s):  
Stella M. Moreiras ◽  
Sergio A. Sepúlveda ◽  
Mariana Correas-González ◽  
Carolina Lauro ◽  
Iván Vergara ◽  
...  
Keyword(s):  
Climate Change ◽  
Debris Flows ◽  
Environmental Changes ◽  
Urban Expansion ◽  
Central Andes ◽  
Semiarid Region ◽  
Change Scenario ◽  
Permafrost Degradation ◽  
Mountain Areas ◽  
Negative Impacts

This review paper compiles research related to debris flows and hyperconcentrated flows in the central Andes (30°–33° S), updating the knowledge of these phenomena in this semiarid region. Continuous records of these phenomena are lacking through the Andean region; intense precipitations, sudden snowmelt, increased temperatures on high relief mountain areas, and permafrost degradation are related to violent flow discharges. Documented catastrophic consequences related to these geoclimatic events highlight the need to improve their understanding in order to prepare the Andean communities for this latent danger. An amplified impact is expected not only due to environmental changes potentially linked to climate change but also due to rising exposure linked to urban expansion toward more susceptible or unstable areas. This review highlights as well the need for the implementation of preventive measures to reduce the negative impacts and vulnerability of the Andean communities in the global warming context.

scholarly journals Seeds and Seedlings in a Changing World: A Systematic Review and Meta-Analysis from High Altitude and High Latitude Ecosystems

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 768
Author(s):  
Jerónimo Vázquez-Ramírez ◽  
Susanna E. Venn
Keyword(s):  
Climate Change ◽  
High Altitude ◽  
High Latitude ◽  
Seedling Establishment ◽  
Early Life History ◽  
Life Stages ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
Life History Stages ◽  
Early Snowmelt

The early life-history stages of plants, such as germination and seedling establishment, depend on favorable environmental conditions. Changes in the environment at high altitude and high latitude regions, as a consequence of climate change, will significantly affect these life stages and may have profound effects on species recruitment and survival. Here, we synthesize the current knowledge of climate change effects on treeline, tundra, and alpine plants’ early life-history stages. We systematically searched the available literature on this subject up until February 2020 and recovered 835 potential articles that matched our search terms. From these, we found 39 studies that matched our selection criteria. We characterized the studies within our review and performed a qualitative and quantitative analysis of the extracted meta-data regarding the climatic effects likely to change in these regions, including projected warming, early snowmelt, changes in precipitation, nutrient availability and their effects on seed maturation, seed dormancy, germination, seedling emergence and seedling establishment. Although the studies showed high variability in their methods and studied species, the qualitative and quantitative analysis of the extracted data allowed us to detect existing patterns and knowledge gaps. For example, warming temperatures seemed to favor all studied life stages except seedling establishment, a decrease in precipitation had a strong negative effect on seed stages and, surprisingly, early snowmelt had a neutral effect on seed dormancy and germination but a positive effect on seedling establishment. For some of the studied life stages, data within the literature were too limited to identify a precise effect. There is still a need for investigations that increase our understanding of the climate change impacts on high altitude and high latitude plants’ reproductive processes, as this is crucial for plant conservation and evidence-based management of these environments. Finally, we make recommendations for further research based on the identified knowledge gaps.

scholarly journals A demographic approach to study effects of climate change in desert plants

2012 ◽  
Vol 367 (1606) ◽  
pp. 3100-3114 ◽  
Author(s):  
Roberto Salguero-Gómez ◽  
Wolfgang Siewert ◽  
Brenda B. Casper ◽  
Katja Tielbörger
Keyword(s):  
Climate Change ◽  
Life History Strategies ◽  
Future Climate Change ◽  
Desert Plant ◽  
Desert Plants ◽  
Population Growth Rates ◽  
Growing Seasons ◽  
Mechanistic Approach ◽  
Negative Impacts ◽  
Variable Precipitation

Desert species respond strongly to infrequent, intense pulses of precipitation. Consequently, indigenous flora has developed a rich repertoire of life-history strategies to deal with fluctuations in resource availability. Examinations of how future climate change will affect the biota often forecast negative impacts, but these—usually correlative—approaches overlook precipitation variation because they are based on averages . Here, we provide an overview of how variable precipitation affects perennial and annual desert plants, and then implement an innovative, mechanistic approach to examine the effects of precipitation on populations of two desert plant species. This approach couples robust climatic projections, including variable precipitation, with stochastic, stage-structured models constructed from long-term demographic datasets of the short-lived Cryptantha flava in the Colorado Plateau Desert (USA) and the annual Carrichtera annua in the Negev Desert (Israel). Our results highlight these populations' potential to buffer future stochastic precipitation. Population growth rates in both species increased under future conditions: wetter, longer growing seasons for Cryptantha and drier years for Carrichtera . We determined that such changes are primarily due to survival and size changes for Cryptantha and the role of seed bank for Carrichtera . Our work suggests that desert plants, and thus the resources they provide, might be more resilient to climate change than previously thought.

Climate Change Impacts on Agriculture in Latin America and the Caribbean: An Application of the Integrated Economic-Environmental Modeling (IEEM) Platform

2021 ◽  
Author(s):  
Onil Banerjee ◽  
Martin Cicowiez ◽  
Ana Rios ◽  
Cicero De Lima
Keyword(s):  
Climate Change ◽  
Labor Productivity ◽  
Latin American ◽  
Climate Change Impacts ◽  
Crop Productivity ◽  
Environmental Modeling ◽  
Sectoral Output ◽  
The Caribbean ◽  
Negative Impacts ◽  
Agricultural Yields

In this paper, we assess the economy-wide impact of Climate Change (CC) on agriculture and food security in 20 Latin American and the Caribbean (LAC) countries. Specifically, we focus on the following three channels through which CC may affect agricultural and non-agricultural production: (i) agricultural yields; (ii) labor productivity in agriculture, and; (iii) economy-wide labor productivity. We implement the analysis using the Integrated Economic-Environmental Model (IEEM) and databases for 20 LAC available through the OPEN IEEM Platform. Our analysis identifies those countries most affected according to key indicators including Gross Domestic Product (GDP), international commerce, sectoral output, poverty, and emissions. Most countries experience negative impacts on GDP, with the exception of the major soybean producing countries, namely, Brazil, Argentina and Uruguay. We find that CC-induced crop productivity and labor productivity changes affect countries differently. The combined impact, however, indicates that Belize, Nicaragua, Guatemala and Paraguay would fare the worst. Early identification of these hardest hit countries can enable policy makers pre-empting these effects and beginning the design of adaptation strategies early on. In terms of greenhouse gas emissions, only Argentina, Chile and Uruguay would experience small increases in emissions.

Social Comparison for Concern and Action on Climate Change, Racial Injustice, and COVID-19

2021 ◽  
Author(s):  
Virginia Ulichney ◽  
Johanna Jarcho ◽  
Thomas Shipley ◽  
joy ham ◽  
Chelsea Helion
Keyword(s):  
Climate Change ◽  
Social Comparison ◽  
Social Issues ◽  
Personal Control ◽  
Personal Concern ◽  
Racial Injustice ◽  
Negative Impacts ◽  
Perceived Personal Control

Preventing the negative impacts of major, intersectional U.S. social issues hinges on personal concern and willingness to take action. We examined social comparison of COVID-19, racial injustice, and climate change during Fall 2020. Participants in a U.S. university sample (n = 288), reported personal levels of concern and action taken on these issues, and estimated their peers’ concern and action. Participants accurately estimated similar levels of personal and peer concern for racial injustice and climate change, but overestimated peer concern for COVID-19. At higher personal concern levels, people estimated that they took greater action than peers for all issues. Exploratory analyses found that perceived personal control over social issues increased participants’ concern and action for racial injustice and climate change, but yielded no change for COVID-19. This suggests that issue-specific features, including perceived controllability, may drive people to differently assess their experience of distinct social issues relative to peers.

Adapting to climate change for food security in the Rift Valley dry lands of Ethiopia: supplemental irrigation, plant density and sowing date

2016 ◽  
Vol 155 (5) ◽  
pp. 703-724 ◽  
Author(s):  
A. MULUNEH ◽  
L. STROOSNIJDER ◽  
S. KEESSTRA ◽  
B. BIAZIN
Keyword(s):  
Climate Change ◽  
Food Security ◽  
Plant Density ◽  
Maize Yield ◽  
Sowing Date ◽  
Supplemental Irrigation ◽  
Dry Spells ◽  
Negative Impacts ◽  
Improve Food Security ◽  
Impacts Of Climate Change

SUMMARYStudies on climate impacts and related adaptation strategies are becoming increasingly important to counteract the negative impacts of climate change. In Ethiopia, climate change is likely to affect crop yields negatively and therefore food security. However, quantitative evidence is lacking about the ability of farm-level adaptation options to offset the negative impacts of climate change and to improve food security. The MarkSim Global Climate Model weather generator was used to generate projected daily rainfall and temperature data originally taken from the ECHAM5 general circulation model and ensemble mean of six models under high (A2) and low (B1) emission scenarios. The FAO AquaCrop model was validated and subsequently used to predict maize yields and explore three adaptation options: supplemental irrigation (SI), increasing plant density and changing sowing date. The maximum level of maize yield was obtained when the second level of supplemental irrigation (SI2), which is the application of irrigation water when the soil water depletion reached 75% of the total available water in the root zone, is combined with 30 000 plants/ha plant density. It was also found that SI has a marginal effect in good rainfall years but using 94–111 mm of SI can avoid total crop failure in drought years. Hence, SI is a promising option to bridge dry spells and improve food security in the Rift Valley dry lands of Ethiopia. Expected longer dry spells during the shorter rainy season (Belg) in the future are likely to further reduce maize yield. This predicted lower maize production is only partly compensated by the expected increase in CO2 concentration. However, shifting the sowing period of maize from the current Belg season (mostly April or May) to the first month of the longer rainy season (Kiremt) (June) can offset the predicted yield reduction. In general, the present study showed that climate change will occur and, without adaptation, will have negative effects. Use of SI and shifting sowing dates are viable options for adapting to the changes, stabilizing or increasing yield and therefore improving food security for the future.

scholarly journals Separate and Combined Impacts of Land Cover and Climate Changes on Hydrological Responses of Dhidhessa River Basin, Ethiopia

2020 ◽  
Author(s):  
Gizachew Kabite ◽  
Misgana Muleta ◽  
Berhan Gessesse
Keyword(s):  
Climate Change ◽  
Land Cover ◽  
Groundwater Recharge ◽  
Land Cover Change ◽  
River Basin ◽  
Surface Runoff ◽  
Climate Changes ◽  
Negative Impacts ◽  
Hydrologic Responses ◽  
Soil And Water

Land cover and climate changes greatly influence hydrologic responses of a basin. However, the response vary from basin to basin depending on the nature and severity of the changes and basin characteristics. Moreover, the combined impacts of the changes affect hydrologic responses of a basin in an offsetting or synergistic manner. This study quantified the separate and combined impacts, and the relative contributions of land cover and climate changes on multiple hydrological regimes (i.e., surface runoff, streamflow, groundwater recharge evapotranspiration) for the Dhidhessa Subbasin. Land cover and climate change data were obtained from a recent study completed for the basin. Calibrated Soil and Water Analysis Tool (SWAT) was used to quantify the impacts. The result showed that SWAT model performed well for the Dhidhessa Subbasin in predicting the water balance components. Substantial land cover change as well as an increasing temperature and rainfall trends were reported in the river basin during the past three decades. In response to these changes, surface runoff, streamflow and actual evapotranspiration (AET) increased while groundwater recharge declined. Surface runoff was more sensitive to land cover than to climate changes whereas streamflow and AET were more sensitive to climate change than to land cover change. The combined impacts played offsetting effect on groundwater recharge and AET while inconsistent effects within study periods for other hydrologic responses. Overall, the predicted hydrologic responses will have negative impacts on agricultural production and water resources availability. Therefore, the implementation of integrated watershed management strategies such as soil and water conservation and afforestation could reverse the negative impacts.

scholarly journals Staying Alive: Science Fiction in the Age of the Anthropocene — Philip K. Dick’s Pessimistic Humanism

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Tallulah Harvey
Keyword(s):  
Climate Change ◽  
Science Fiction ◽  
Environmental Politics ◽  
Public Awareness ◽  
Human Species ◽  
The Earth ◽  
Scientific Advancement ◽  
Negative Impacts ◽  
The Relationship ◽  
Impacts Of Climate Change

In recent years, literary studies have become increasingly invested in environmentalism. As science reveals the negative impacts of climate change, and demonstrates a growing concern for humanity’s contribution, literature operates as a form of cultural documentation. It details public awareness and anxieties, and acts as a conduit for change by urging empathetic responses and rendering ecological controversy accessible.To explore the relationship between literature and environmental politics, this paper will focus on the work of science fiction writer Philip K. Dick, and his dystopian visions. In his particular brand of sci-fi, there is no future for humanity. Science and technology fail to pave the way for a better and fairer society, but rather towards, as far as Dick is concerned, extinction. He argues that scientific advancement distances us from reality and from a sense of “humanness”. His pessimistic futures are nihilistic but tender; nurturing a love for humanity even in, what he considers to be, its final hours.Unlike the work of other prominent sci-fi writers, Dick’s fiction does not look towards the stars, but is in many ways a return to earth. The barren landscapes of Mars and other planets offer no comfort, and the evolution of the human into cyborgs, androids and post human species is depicted as dangerous and regressive. Dick’s apocalyptic visions ground his readers in the reality around them, acting in the present for the sake of the earth and humanity’s survival. His humanism is critical of grand enlightenment ideas of “progressivism”, and instead celebrates ordinariness. In the shadow of corporate capitalism and violent dictatorial governments, Dick prefers the little man, the ordinary everyday domestic hero for his narratives. His fiction urges us to take responsibility for our actions, and prepares us for the future through scepticism and pessimism, and a relentless fondness for the human.

scholarly journals Impact of Climate Change on Crop & Predict the Disease

2021 ◽  
Vol 9 (VI) ◽  
pp. 3063-3070
Author(s):  
Shraddha S. Garud
Keyword(s):  
Climate Change ◽  
Growth And Development ◽  
Climate Changes ◽  
Plant Diseases ◽  
Life Stages ◽  
Social Changes ◽  
Temporal And Spatial Distribution ◽  
Climate Influences ◽  
Temporal And Spatial ◽  
The Individual

The prime need of this world is that the simplest agriculture which decides the event of each country because the survival of the individual is completely obsessed with farming and its best production. Climate changes are in response to changes within the hydrosphere, biosphere, and other atmospheric and interacting factors. Human activities driven by demographic, economic, technological, and social changes have a big impact on activity. The climate influences the incidence further as the temporal and spatial distribution of plant diseases. the foremost factors that control the growth and development of diseases are temperature, light, and water. Climate affects all life stages of the pathogen and host and poses a challenge to many pathosystems. The environmental change, especially when combined with the pathogen and host introductions, may cause unprecedented effects.

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