The response of trophic interaction networks to multiple stressors along a large-scale latitudinal range in the Southern Hemisphere DOI
Tomás I. Marina, Leonardo Saravia, Iara Diamela Rodríguez

et al.

Environmental Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: June 27, 2024

Ecological networks offer valuable insights into community structure, key species identification, and ecosystem management. Understanding how these respond to global change stressors is of increasing interest, especially along geographical gradients. This review summarizes potential stressor responses in marine food webs from the Southwest Atlantic Antarctic (45–78°S), encompassing areas such as San Jorge Gulf, Beagle Channel, Burdwood Bank, Scotia Sea, Potter Cove, Weddell Sea Antarctica. The objectives are (1) describe structure this latitudinal axis using a network approach; (2) identify predominant change-related affecting each ecosystem; (3) summarize observed web changes hypothesize on impacts. effects were primarily reviewed at level. Alternative hypotheses for study area formulated considering (a) main stressors; (b) impacted parameters; (c) node-level properties; (d) network-level properties. Global warming emerges most common among studied across gradient, except Channel where alien introduction fisheries more influential. We series alternative may affect webs. emphasizes benefits approach understand predict Southern Hemisphere ecosystems. provides holistic understanding ecosystems, which enhances our ability their interactions, offering management conservation face stressors.

Language: Английский

The complex network of trophic interactions in a sub-Antarctic oceanic Marine Protected Area DOI Creative Commons

TI Marina,

IR Schloss,

Gustavo A. Lovrich

et al.

Marine Ecology Progress Series, Journal Year: 2024, Volume and Issue: 736, P. 1 - 18

Published: April 24, 2024

The world’s oceans designated under marine protection have increased recently. Most protected areas (MPAs) target vulnerable, keystone, charismatic, and/or endemic species. In the sub-Antarctic, ocean is associated with oceanic islands, except for MPAs Namuncurá-Burdwood Bank I and II (MPA N-BB; ~53-55°S, ~56-62°W), which are a submarine plateau southern deep slope, respectively. We present first analysis of predator-prey network MPA N-BB, applying topological approach to characterise complexity structure food web identify species’ role. N-BB consists 1788 interactions 379 species, connectance 0.01. Almost half consumers feed at more than one trophic level (0.48), displays small-world pattern (short path length, high clustering compartments). This suggests that ecosystem might be vulnerable perturbations targeting highly connected although some properties provide resilience resistance, resulting in rearranged preserves its original functions. Several species arise as being important functioning response perturbations. Generalist mainly fishes, play crucial role bentho-pelagic coupling should considered relevant energy transfer agents ecosystem. argue diversity including both benthic pelagic habitats, responsible securing connectivity within withstand perturbations, thereby contributing stability

Language: Английский

Citations

7
Evaluating the impacts of extinction thresholds of species in a marine food web in the Yellow Sea (China) DOI
Peng-Cheng Li, Jie Yin,

Yupeng Ji

et al.

Biological Conservation, Journal Year: 2025, Volume and Issue: 304, P. 111050 - 111050

Published: Feb. 27, 2025

Language: Английский

Citations

0
Developing a Southern Ocean Marine Ecosystem Model Ensemble to Assess Climate Risks and Uncertainties DOI Creative Commons
Kieran Murphy, Denisse Fierro‐Arcos, Tyler Rohr

et al.

Earth s Future, Journal Year: 2025, Volume and Issue: 13(3)

Published: March 1, 2025

Abstract Climate change could irreversibly modify Southern Ocean ecosystems. Marine ecosystem model (MEM) ensembles can assist policy making by projecting future changes and allowing the evaluation assessment of alternative management approaches. However, projected in total consumer biomass from Fisheries Ecosystem Model Intercomparison Project (FishMIP) global MEM ensemble highlight an uncertain for Ocean, indicating need a region‐specific ensemble. A large source uncertainty originates Earth system models used to force FishMIP models, particularly lower trophic level sea‐ice coverage. To build confidence regional MEMs as ecosystem‐based tools changing climate that better account uncertainty, we propose development Ensemble (SOMEME) contributing 2.0 intercomparison initiative. One challenges hampering progress is achieving balance standardised inputs with relevance. As first step, design SOMEME simulation protocol, builds on extends existing framework, stages include: detailed skill forcing variables regions, extension fishing data include whaling, new simulations assess ecological links processes candidate MEMs. These extensions will help advance assessments urgently needed impacts

Language: Английский

Citations

0
Potter Cove's Heavyweights: Estimation of Species' Interaction Strength of an Antarctic Food Web DOI Creative Commons
Iara Diamela Rodríguez, Leonardo Saravia

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(11)

Published: Nov. 1, 2024

ABSTRACT In the West Antarctic Peninsula, global warming has led to severe alterations in community composition, species distribution, and abundance over last decades. Understanding complex interplay between structure stability of marine food webs is crucial for assessing ecosystem resilience, particularly context ongoing environmental changes. this study, we estimate interaction strength within Potter Cove (South Shetland Islands, Antarctica) web elucidate roles its functioning. We use these estimates calculate response perturbations, conducting sequential extinctions quantify importance individual based on changes fragmentation. explore connections key topological properties web. Our findings reveal an asymmetric distribution strengths, with a prevalence weak interactions few strong ones. Species exerting greater influence displayed higher degree trophic similarity but occupied lower levels omnivory (e.g., macroalgae detritus). Extinction simulations revealed role certain species, amphipods black rockcod Notothenia coriiceps , as their removal significant network This study highlights considering strengths polar ecosystems. These insights have implications guiding monitoring conservation strategies aimed at preserving integrity

Language: Английский

Citations

1
Potter Cove’s Heavyweights: Estimation of species’ interaction strength of an Antarctic food web DOI Creative Commons

Iara Hernandez Rodriguez,

Leonardo Saravia

Published: March 16, 2024

Understanding the complex interplay between structure and stability of marine food webs is crucial for assessing ecosystem resilience, particularly in context ongoing environmental changes. In West Antarctic Peninsula, global warming has led to severe alterations community composition, species distribution, abundance over last decades. this study, we estimate interaction strength within Potter Cove (South Shetland Islands, Antarctica) web elucidate roles its functioning. We use these estimates calculate response perturbations, conducting sequential extinctions quantify importance individual based on changes fragmentation. explore connections key topological properties web. Our findings reveal an asymmetric distribution strengths, with a prevalence weak interactions few strong ones. Species exerting greater influence displayed higher degree trophic similarity but occupied lower levels omnivory (e.g., macroalgae detritus). Extinction simulations revealed role certain species, amphipods black rockcod Notothenia coriiceps, as their removal significant network This study highlights considering strengths polar ecosystems. These insights have implications guiding monitoring conservation strategies aimed at preserving integrity

Language: Английский

Citations

0
Potter Cove’s Heavyweights: Estimation of species’ interaction strength of an Antarctic food web DOI Open Access
Iara Diamela Rodríguez, Leonardo Saravia

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: April 25, 2024

Understanding the complex interplay between structure and stability of marine food webs is crucial for assessing ecosystem resilience, particularly in context ongoing environmental changes. In West Antarctic Peninsula, global warming has led to severe alterations community composition, species distribution, abundance over last decades. this study, we estimate interaction strength within Potter Cove (South Shetland Islands, Antarctica) web elucidate roles its functioning. We use these estimates calculate response perturbations, conducting sequential extinctions quantify importance individual based on changes fragmentation. explore connections key topological properties web. Our findings reveal an asymmetric distribution strengths, with a prevalence weak interactions few strong ones. Species exerting greater influence displayed higher degree trophic similarity but occupied lower levels omnivory (e.g., macroalgae detritus). Extinction simulations revealed role certain species, amphipods black rockcod Notothenia coriiceps, as their removal significant network This study highlights considering strengths polar ecosystems. These insights have implications guiding monitoring conservation strategies aimed at preserving integrity

Language: Английский

Citations

0
The response of trophic interaction networks to multiple stressors along a large-scale latitudinal range in the Southern Hemisphere DOI
Tomás I. Marina, Leonardo Saravia, Iara Diamela Rodríguez

et al.

Environmental Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: June 27, 2024

Ecological networks offer valuable insights into community structure, key species identification, and ecosystem management. Understanding how these respond to global change stressors is of increasing interest, especially along geographical gradients. This review summarizes potential stressor responses in marine food webs from the Southwest Atlantic Antarctic (45–78°S), encompassing areas such as San Jorge Gulf, Beagle Channel, Burdwood Bank, Scotia Sea, Potter Cove, Weddell Sea Antarctica. The objectives are (1) describe structure this latitudinal axis using a network approach; (2) identify predominant change-related affecting each ecosystem; (3) summarize observed web changes hypothesize on impacts. effects were primarily reviewed at level. Alternative hypotheses for study area formulated considering (a) main stressors; (b) impacted parameters; (c) node-level properties; (d) network-level properties. Global warming emerges most common among studied across gradient, except Channel where alien introduction fisheries more influential. We series alternative may affect webs. emphasizes benefits approach understand predict Southern Hemisphere ecosystems. provides holistic understanding ecosystems, which enhances our ability their interactions, offering management conservation face stressors.

Language: Английский

Citations

0