Are Habitat Fragmentation Effects Stronger in Marine Systems? A Review and Meta-analysis

Yeager, Lauren A.; Estrada, Jenelle; Holt, Kathleen; Keyser, Spencer R.; Oke, Tobi A.

doi:10.1007/s40823-020-00053-w

Cited by 22 publications

(17 citation statements)

References 59 publications

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“…This pattern may occur if urbanization results in habitat fragmentation, creating novel habitats, and therefore attracting new species (e.g. Yeager et al, 2020). Invasions and fisheries activities may also shift the food web to the advantage of species that were formerly rare such that they are now commonly observed.…”

Section: Discussionmentioning

confidence: 99%

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Sea‐surface temperature anomalies mediate changes in fish richness and abundance in Atlantic and Gulf of Mexico estuaries

Oke

Zhang

Keyser

et al. 2022

Journal of Biogeography

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Aim Anthropogenic warming of marine systems has caused biological and physiological responses that are fundamentally altering ecosystem structure. Because estuaries exist at the land‐ocean interface, they are particularly vulnerable to the effects of ocean warming as they can undergo rapid biogeochemical and hydrological shifts due to climate and land‐use change. We explored how multiple components of estuarine fish diversity—turnover, richness, and abundance—have changed in the North Atlantic and Gulf of Mexico estuaries across space and time and the drivers of change. Location North Atlantic and Gulf of Mexico. Taxa Fish. Method We compiled long‐term (>30 years), continent‐wide fisheries independent trawl surveys conducted in estuaries—from the Gulf of Maine to the Gulf of Mexico (U.S. waters)—and combined these with climate and land‐use‐land‐cover data to examine trends and ecological drivers of fish richness, abundance and turnover using mixed‐effect models. Results Species richness, abundance and turnover have increased in North Atlantic and Gulf of Mexico estuaries in the last 30 years. These changes were mediated largely by sea‐surface temperature anomalies, especially in more northern estuaries where warming has been relatively pronounced. Main Conclusion The increasing trajectory of turnover in many estuaries suggests that fish communities have changed fundamentally from the baselines. A fundamental change in community composition can lead to an irreversible trophic imbalance or alternative stable states among other outcomes. Thus, predicting how shifting community structures might influence food webs, ecosystem stability, and human resource use remain a pertinent task.

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Section: Discussionmentioning

confidence: 99%

“…This pattern may occur if urbanization results in habitat fragmentation, creating novel habitats, and therefore attracting new species (e.g. Yeager et al, 2020).…”

Section: Re Sultsmentioning

confidence: 99%

Sea‐surface temperature anomalies mediate changes in fish richness and abundance in Atlantic and Gulf of Mexico estuaries

Oke

Zhang

Keyser

et al. 2022

Journal of Biogeography

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“…Thus, it is evidenced that even though food is indisputably an attractive factor, contamination can condition the choice of organisms to forage, and thus they are likely underuse the food resources of the habitat. Human-modified landscapes are increasingly fragmenting habitats and varying their spatial complexity and connectivity (Fuller et al, 2015;Gilarranz et al, 2017;Yeager et al, 2020). This unfavorable scenario supposes a susceptibility to population decline and dispersion as habitat is lost and disturbances such as contamination restrict habitat use.…”

Section: Discussionmentioning

confidence: 99%

Experimental Evidence of Contamination Driven Shrimp Population Dynamics: Susceptibility of Populations to Spatial Isolation

Guerrero¹,

Rodríguez-Ruiz²,

Castro³

et al. 2021

SSRN Journal

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“…Habitat loss and fragmentation combined with greater exposure to human land uses have resulted in widespread declines in biodiversity. These landscape changes have been linked to negative impacts on populations of fish [ 4 ], mammals [ 5 ], birds [ 6 , 7 ], insects [ 8 ], and plants [ 9 ]. Indeed, one of the key questions in conservation biology is determining the effects of habitat loss versus habitat fragmentation per se [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Habitat amount or landscape configuration: Emerging HotSpot analysis reveals the importance of habitat amount for a grassland bird in South Dakota

2022

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Habitat loss and fragmentation are two important drivers of biodiversity decline. Understanding how species respond to landscape composition and configuration in dynamic landscapes is of great importance for informing the conservation and management of grassland species. With limited conservation resources, prescribed management targeted at the appropriate landscape process is necessary for the effective management of species. We used pheasants (Phasianus colchicus) across South Dakota, USA as a model species to identify environmental factors driving spatiotemporal variation in population productivity. Using an emerging Hotspot analysis, we analyzed annual count data from 105 fixed pheasant brood routes over a 24-year period to identify high (HotSpot) and low (ColdSpot) pheasant population productivity areas. We then applied classification and regression tree modeling to evaluate landscape attributes associated with pheasant productivity among spatial scales (500 m and 1000 m). We found that the amount of grassland at a local spatial scale was the primary factor influencing an area being a HotSpot. Our results also demonstrated non-significant or weak effects of fragmentation per se on pheasant populations. These findings are in accordance with the habitat amount hypothesis highlighting the importance of habitat amount in the landscape for maintaining and increasing the pheasant population. We, therefore, recommend that managers should focus on increasing the total habitat area in the landscape and restoring degraded habitats. Our method of identifying areas of high productivity across the landscape can be applied to other species with count data.

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Are Habitat Fragmentation Effects Stronger in Marine Systems? A Review and Meta-analysis

Cited by 22 publications

References 59 publications

Sea‐surface temperature anomalies mediate changes in fish richness and abundance in Atlantic and Gulf of Mexico estuaries

Sea‐surface temperature anomalies mediate changes in fish richness and abundance in Atlantic and Gulf of Mexico estuaries

Experimental Evidence of Contamination Driven Shrimp Population Dynamics: Susceptibility of Populations to Spatial Isolation

Habitat amount or landscape configuration: Emerging HotSpot analysis reveals the importance of habitat amount for a grassland bird in South Dakota

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