Effects of climate change on zooplankton community interactions in an Alaskan lake

Abstract Ainsworth, C. H., Samhouri, J. F., Busch, D. S., Cheung, W. W. L., Dunne, J., and Okey, T. A. 2011. Potential impacts of climate change on Northeast Pacific marine foodwebs and fisheries. – ICES Journal of Marine Science, 68: 1217–1229. Although there has been considerable research on the impacts of individual changes in water temperature, carbonate chemistry, and other variables on species, cumulative impacts of these effects have rarely been studied. Here, we simulate changes in (i) primary productivity, (ii) species range shifts, (iii) zooplankton community size structure, (iv) ocean acidification, and (v) ocean deoxygenation both individually and together using five Ecopath with Ecosim models of the northeast Pacific Ocean. We used a standardized method to represent climate effects that relied on time-series forcing functions: annual multipliers of species productivity. We focused on changes in fisheries landings, biomass, and ecosystem characteristics (diversity and trophic indices). Fisheries landings generally declined in response to cumulative effects and often to a greater degree than would have been predicted based on individual climate effects, indicating possible synergies. Total biomass of fished and unfished functional groups displayed a decline, though unfished groups were affected less negatively. Some functional groups (e.g. pelagic and demersal invertebrates) were predicted to respond favourably under cumulative effects in some regions. The challenge of predicting climate change impacts must be met if we are to adapt and manage rapidly changing marine ecosystems in the 21st century.

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Facing Climate Change: Application of Microbial Biostimulants to Mitigate Stress in Horticultural Crops

Agronomy ◽

10.3390/agronomy10060794 ◽

2020 ◽

Vol 10 (6) ◽

pp. 794 ◽

Cited By ~ 3

Author(s):

Daniela Sangiorgio ◽

Antonio Cellini ◽

Irene Donati ◽

Chiara Pastore ◽

Claudia Onofrietti ◽

...

Keyword(s):

Climate Change ◽

Climate Changes ◽

Current Knowledge ◽

Future Research ◽

Community Interactions ◽

Symbiotic Interaction ◽

Horticultural Crops ◽

Current Scenario ◽

Microbial Symbionts ◽

Plant Level

In the current scenario of rapidly evolving climate change, crop plants are more frequently subjected to stresses of both abiotic and biotic origin, including exposure to unpredictable and extreme climatic events, changes in plant physiology, growing season and phytosanitary hazard, and increased losses up to 30% and 50% in global agricultural productions. Plants coevolved with microbial symbionts, which are involved in major functions both at the ecosystem and plant level. The use of microbial biostimulants, by exploiting this symbiotic interaction, represents a sustainable strategy to increase plant performances and productivity, even under stresses due to climate changes. Microbial biostimulants include beneficial fungi, yeasts and eubacteria sharing the ability to improve plant nutrition, growth, productivity and stress tolerance. This work reports the current knowledge on microbial biostimulants and provides a critical review on their possible use to mitigate the biotic and abiotic stresses caused by climate changes. Currently, available products often provide a general amelioration of cultural conditions, but their action mechanisms are largely undetermined and their effects often unreliable. Future research may lead to more specifically targeted products, based on the characterization of plant-microbe and microbial community interactions.

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The impacts of climate change on plankton as live food: A review

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/869/1/012005 ◽

2021 ◽

Vol 869 (1) ◽

pp. 012005

Author(s):

N Azani ◽

M A Ghaffar ◽

H Suhaimi ◽

M N Azra ◽

M M Hassan ◽

...

Keyword(s):

Climate Change ◽

Food Web ◽

Food Source ◽

Vertical Mixing ◽

Zooplankton Community ◽

Nutrient Cycle ◽

Aquatic Food Web ◽

Food Web Structure ◽

Aquatic Food ◽

Critical Components

Abstract Climate change is expected to warm up the ocean surface where majority of life inhabits. Ocean warming influences vertical mixing and stratification patterns, which alter nutrient cycle, plankton production, and aquatic food web. Plankton serves as the first food source for all larval organisms and the base of aquatic ecosystem. Zooplankton community is a crucial component of the aquatic food web. They are critical components in an ecosystem of aquatic and worldwide biogeochemical cycles. Zooplankton contributes as food source to economically valuable fishes, primary-production grazers, and carbon and nutrient cycle drivers. Climate change contributes to dire consequences by altering the baseline of aquatic food web structure. However, the ocean biota itself can influence climate change, and the implications of this are evident from the increase and decrease of wild fisheries production. This review highlights the effect of climate change on phytoplankton and zooplankton production.

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Climate-driven zooplankton shifts could cause global declines in food quality for fish

10.21203/rs.3.rs-953268/v1 ◽

2021 ◽

Author(s):

Ryan Heneghan ◽

Jason Everett ◽

Julia Blanchard ◽

Patrick Sykes ◽

Anthony Richardson

Keyword(s):

Climate Change ◽

Food Webs ◽

Marine Ecosystem ◽

Zooplankton Community ◽

Climate Change Impacts ◽

Ecosystem Model ◽

Primary Energy ◽

Phytoplankton Production ◽

Marine Ecosystem Model ◽

Assess Climate Change

Abstract Although zooplankton are the primary energy pathway from phytoplankton to fish, we understand little about how climate change will modify zooplankton communities and their role in marine ecosystems. Using a trait-based marine ecosystem model resolving key zooplankton groups, we assess climate change impacts on zooplankton community composition and implications for marine food webs globally. We find that future oceans favour food webs increasingly dominated by carnivorous (chaetognaths, jellyfish and carnivorous copepods) and gelatinous filter-feeding zooplankton (larvaceans and salps). By providing a direct energetic pathway from small phytoplankton to fish, the rise of gelatinous filter-feeders largely offsets the increase in trophic steps between primary producers and fish from declining phytoplankton production and increasing carnivorous zooplankton. However, our results indicate that future fish communities face not only reduced carrying capacity from falling primary production, but also lower quality diets as environmental conditions increasingly favour gelatinous zooplankton.

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Paradigm of Climate Change and its Influence on Zooplankton

Biosciences Biotechnology Research Asia ◽

10.13005/bbra/2929 ◽

2021 ◽

Vol 18 (2) ◽

pp. 423-438

Author(s):

Mohammad Yasir Arafat ◽

Yahya Bakhtiyar ◽

Zahoor Ahmad Mir ◽

Hamid Iqbal Tak

Keyword(s):

Climate Change ◽

Aquatic Ecosystem ◽

Abiotic Factors ◽

Zooplankton Community ◽

Trophic Levels ◽

Aquatic Biota ◽

Scientific Policy ◽

Human Beings ◽

Before And After ◽

Aquatic Food

Zooplankton are the precious elements of aquatic ecosphere playing a significant role in some ecological phenomena viz., biomonitoring, ecological indication, link between primary producers and higher trophic levels, aquaculture,and maintenance of balance in aquatic food webs.The climate,being a dynamic abiotic entity, changed many times during the history of earth particularly before and after the industrial revolution.The unending materialistic benefits of human beings have been increasing the concentration of greenhouse gases such as carbon dioxide, methane, nitrous oxide, and fluorinated gases since the last few decades that is enough to raise the global temperature. It is a fact that both biotic and abiotic factors affect the dynamics of aquatic biota due to which the aquatic ecosystems and the organisms inhabiting them such as zooplankton are becoming the worst targets of the climate change phenomenon. Some of the significant consequences of climate change posing threats for the zooplankton community include increased temperature, acidification, nutrient enrichment,and increasing ultraviolet (UV) environment of the aquatic ecosystem that significantly affect theirsurvival, behaviour, nutritional procurement, reproduction,and their overall population dynamics.Due to the profound effects of climate change on the zooplankton community, the entire aquatic food web gets crushed away leading to more severe concerns about the higher trophic levels and overall dynamics of the aquatic biota. Thus,unending loss in the dynamics of the aquatic ecosystem could prevailand will go on expanding if the causal factors of climate change continue to operate beyond their limits unless a strong scientific policy and framework in contrary to climate change are reinforced with the key focus on aquatic biota especially zooplankton.

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Impact of climate change on long-term zooplankton biomass in the upwelling region of the Gulf of Guinea

ICES Journal of Marine Science ◽

10.1093/icesjms/fsn042 ◽

2008 ◽

Vol 65 (3) ◽

pp. 318-324 ◽

Cited By ~ 31

Author(s):

George Wiafe ◽

Hawa B. Yaqub ◽

Martin A. Mensah ◽

Christopher L. J. Frid

Keyword(s):

Climate Change ◽

Climatic Factors ◽

Southern Oscillation ◽

Global Climate ◽

Zooplankton Community ◽

Zooplankton Biomass ◽

Gulf Of Guinea ◽

Zooplankton Community Structure ◽

Impact Of Climate Change

Abstract Wiafe, G., Yaqub, H. B., Mensah, M. A., and Frid, C. L. J. 2008. Impact of climate change on long-term zooplankton biomass in the upwelling region of the Gulf of Guinea. – ICES Journal of Marine Science, 65: 318–324. We investigated long-term changes in coastal zooplankton in the upwelling region in the Gulf of Guinea, 1969–1992, in relation to climatic and biotic factors. We considered the role of hydrographic and climatic factors, i.e. sea surface temperature (SST), salinity, sea level pressure, windfield, and Southern Oscillation Index (SOI), in the long-term variation of zooplankton in a multiple regression analysis, along with the abundance of Sardinella. Annual variation in zooplankton biomass was cyclical, with the annual peak occurring during the major upwelling season, July–September. Over the 24-year period, there was a downward trend in zooplankton biomass (equivalent to 6.33 ml per 1000 m3 per year). The decomposed trend in SST during the major upwelling revealed gradual warming of surface waters. This trend was believed to be the main influence on the abundance of the large copepod Calanoides carinatus (sensitive to temperatures above 23°C), which appears in the coastal waters only during the major upwelling season. The warming trend associated with global climate change could affect zooplankton community structure, especially during the major upwelling season. Global warming coupled with “top–down” (predation) control by Sardinella might be responsible for the long-term decline in zooplankton biomass in the upwelling region of the Gulf of Guinea.

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The TasFACE climate-change impacts experiment: design and performance of combined elevated CO2 and temperature enhancement in a native Tasmanian grassland

Australian Journal of Botany ◽

10.1071/bt04194 ◽

2006 ◽

Vol 54 (1) ◽

pp. 1 ◽

Cited By ~ 41

Author(s):

M. J. Hovenden ◽

F. Miglietta ◽

A. Zaldei ◽

J. K. Vander Schoor ◽

K. E. Wills ◽

...

Keyword(s):

Climate Change ◽

Vascular Plant ◽

Co2 Enrichment ◽

Climate Change Impacts ◽

Co2 Concentration ◽

Elevated Concentration ◽

Plant Population Dynamics ◽

Community Interactions ◽

And Performance ◽

Elevated Co2 And Temperature

The potential impacts of climate change on both natural and managed ecosystems are far-reaching and are only beginning to be understood. Here we describe a new experiment that aims to determine the impacts of elevated concentration of CO2 ([CO2]) and elevated temperature on a native Themeda–Austrodanthonia-dominated grassland ecosystem in south-eastern Tasmania. The experimental site contains 60 vascular plant species. The experiment combines the latest developments in free-air CO2 enrichment (FACE) technology with the use of infrared (IR) heaters to mimic environmental conditions expected to exist in the year 2050. The CO2 concentration in the FACE treatments is reliably maintained at 550 µmol mol–1 and leaf temperature is elevated by an average of 2.1°C by the IR treatment, with 1-cm soil temperature being elevated by 0.8°C. Measurements being made in the experiment cover plant ecophysiological responses, plant population dynamics and community interactions. Soil processes and ecosystem effects, including nutrient cycling and plant animal interactions, are also being investigated. Collaborations are invited from interested parties.

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Coastal Community's Perception on Climate Change and Its Impacts: Analysis of Local Coastal Community of Winneba, Ghana

Asian Research Journal of Arts & Social Sciences ◽

10.9734/arjass/2020/v12i130183 ◽

2020 ◽

pp. 43-55

Author(s):

Johnson Ankrah

Keyword(s):

Climate Change ◽

Sea Level Rise ◽

Sea Level ◽

Local Community ◽

Policy Framework ◽

Survey Method ◽

Community Perception ◽

Community Interactions ◽

Coastal Community ◽

Mitigation And Adaptation

Aims: The study assessed the perception of the coastal inhabitants of Winneba on climate change and its impacts. Study Design: This study is descriptive in nature and employed both qualitative and quantitative approaches. Place and Duration of Study: This research was conducted in Winneba, Ghana in February 2020. Methodology: The survey method of research was employed in this study. An annual mean temperature timeseries data of Winneba from 1980- 2017 to supplement respondents' subjective views. In addition, community interactions were conducted to get personal information from the inhabitants about the impacts of climate change. 152 inhabitants were sampled through the convenience and the purposive sampling techniques. The convenience technique was used to select 148 respondents and 3 fishermen, and 1 fish seller selected purposively. This was done through questionnaire administration and interviews. Community's interactions centred on inhabitants' perception of climate change and its impacts. Results: The study found that temperature in the Winneba community has increased. The study again found diverse views on the most serious impact of climate change in the community. While some attributed it to rising temperatures, others attributed it to sea level rise and coastal erosion. The study also revealed that although many of the inhabitants lamented about rising temperatures as it disrupts their daily activities and cause diseases, sea level rise and erosion has also played a devastating role on the environment which needs to be addressed. Conclusion: Local community perception and knowledge on climate change is important. Increased knowledge and awareness influence a community’s choice of mitigation and adaptation to climate change impacts. A comprehensive policy framework on climate change awareness creation and education should, therefore, be implemented and made available to local coastal community members.

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Identifying robust strategies for assisted migration in a competitive stochastic metacommunity

10.1101/811497 ◽

2019 ◽

Author(s):

Gregory A. Backus ◽

Marissa L. Baskett

Keyword(s):

Climate Change ◽

Extinction Risk ◽

Future Climate Change ◽

Dispersal Ability ◽

Assisted Migration ◽

Management Scenarios ◽

Community Interactions ◽

Competitive Model ◽

Donor Population ◽

Population Sizes

AbstractAssisted migration is the translocation of species beyond their historical range to locations that are expected to be more suitable under future climate change. However, a relocated population might fail to establish within its donor community if there is high uncertainty in decision making, climate, and interactions with the recipient ecological community. To quantify the benefit to persistence and risk of establishment failure of assisted migration under different management scenarios, we built a stochastic metacommunity model to simulate several species reproducing, dispersing, and competing on a temperature gradient as temperature increases over time. Without assisted migration, the species in our model were vulnerable to climate change if they had low population sizes, short dispersal, and strong poleword competition. When relocating species that exemplified these traits, assisted migration increased the long-term persistence of the species most when relocating a fraction of the donor population, even if the remaining population was very small or rapidly declining. This suggests that leaving behind a fraction of the population could be a robust approach, allowing managers to repeat assisted migration in case they move the species at the wrong place and wrong time, especially when it is difficult to identify a species’ optimal climate. We found that assisted migration was most beneficial to species with low dispersal ability and least beneficial to species with narrow thermal tolerances, for which assisted migration increased extinction risk on average. Lastly, while relocation did not affect the persistence of non-target species in our simple competitive model, researchers will need to consider a more complete set of community interactions to comprehensively understand invasion potential.

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Impact of Nutrients, Temperatures, and a Heat Wave on Zooplankton Community Structure: An Experimental Approach

Water ◽

10.3390/w12123416 ◽

2020 ◽

Vol 12 (12) ◽

pp. 3416 ◽

Cited By ~ 1

Author(s):

Uğur Işkın ◽

Nur Filiz ◽

Yu Cao ◽

Érika M. Neif ◽

Burak Öğlü ◽

...

Keyword(s):

Climate Change ◽

Community Structure ◽

Shallow Lakes ◽

Heat Waves ◽

Zooplankton Community ◽

Fish Predation ◽

Temperature Treatment ◽

Effect Of Temperature ◽

Taxon Richness ◽

Zooplankton Community Structure

Shallow lakes are globally the most numerous water bodies and are sensitive to external perturbations, including eutrophication and climate change, which threaten their functioning. Extreme events, such as heat waves (HWs), are expected to become more frequent with global warming. To elucidate the effects of nutrients, warming, and HWs on zooplankton community structure, we conducted an experiment in 24 flow-through mesocosms (1.9 m in diameter, 1.0 m deep) imitating shallow lakes. The mesocosms have two nutrient levels (high (HN) and low (LN)) crossed with three temperature scenarios based on the Intergovernmental Panel on Climate Change (IPCC) projections of likely warming scenarios (unheated, A2, and A2 + 50%). The mesocosms had been running continuously with these treatments for 11 years prior to the HW simulation, which consisted of an additional 5 °C increase in temperature applied from 1 July to 1 August 2014. The results showed that nutrient effects on the zooplankton community composition and abundance were greater than temperature effects for the period before, during, and after the HW. Before the HW, taxon richness was higher, and functional group diversity and evenness were lower in HN than in LN. We also found a lower biomass of large Cladocera and a lower zooplankton: phytoplankton ratio, indicating higher fish predation in HN than in LN. Concerning the temperature treatment, we found some indication of higher fish predation with warming in LN, but no clear effects in HN. There was a positive nutrient and warming interaction for the biomass of total zooplankton, large and small Copepoda, and the zooplankton: phytoplankton ratio during the HW, which was attributed to recorded HW-induced fish kill. The pattern after the HW largely followed the HW response. Our results suggest a strong nutrient effect on zooplankton, while the effect of temperature treatment and the 5 °C HW was comparatively modest, and the changes likely largely reflected changes in predation.

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