Responses of the macrobenthic community to the Dalian Bay oil spill based on co-occurrence patterns and interaction networks

Gu, Yanbin; You, Yuxi; Thrush, Simon F.; Brustolin, Marco C.; Liu, Yu'an; Tian, Shuang; Ye, Jinqing; Jia, Hao; Liu, Guize

doi:10.1016/j.marpolbul.2021.112662

Cited by 5 publications

(2 citation statements)

References 41 publications

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“…The total set of Ediacaran data exhibits strong metacommunity structure, consistent with previous analyses that resolve multiple assemblages [ 7 – 9 ]. Both the total dataset and the individual assemblages have relatively low numbers of nonrandom co-occurrences (9.8% to 16.7%) compared to many extant analyses (e.g., 35% to 63% [ 60 , 61 ]) as well as terrestrial fossil communities (such as averaging 64% aggregated pairs from the Carboniferous to the Holocene, and 37% from the Holocene to the present [ 62 ], although percentages of nonrandom co-occurrences are similar to at least some extant benthic communities (16.3%) [ 63 ]. Previous spatial analyses of Avalonian communities have revealed limited interspecific interactions [ 11 , 14 ] and limited environmental associations between taxa within communities [ 12 ], so the large number of nonsignificant correlations within the Avalon assemblage are consistent with previous work.…”

Section: Discussionmentioning

confidence: 99%

Metacommunity analyses show an increase in ecological specialisation throughout the Ediacaran period

2022

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The first animals appear during the late Ediacaran (572 to 541 Ma); an initial diversity increase was followed reduction in diversity, often interpreted as catastrophic mass extinction. We investigate Ediacaran ecosystem structure changes over this time period using the “Elements of Metacommunity Structure” framework to assess whether this diversity reduction in the Nama was likely caused by an external mass extinction, or internal metacommunity restructuring. The oldest metacommunity was characterised by taxa with wide environmental tolerances, and limited specialisation or intertaxa associations. Structuring increased in the second oldest metacommunity, with groups of taxa sharing synchronous responses to environmental gradients, aggregating into distinct communities. This pattern strengthened in the youngest metacommunity, with communities showing strong environmental segregation and depth structure. Thus, metacommunity structure increased in complexity, with increased specialisation and resulting in competitive exclusion, not a catastrophic environmental disaster, leading to diversity loss in the terminal Ediacaran. These results reveal that the complex eco-evolutionary dynamics associated with Cambrian diversification were established in the Ediacaran.

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Section: Discussionmentioning

confidence: 99%

Metacommunity analyses show an increase in ecological specialisation throughout the Ediacaran period

2022

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“…To accurately determine the plant-plant interaction, such as facilitation or competition, a comparison experiment for plant richness between patches and cushions should have been conducted (Piper et al 2019). Moreover, co-occurrence analysis is based on plant presence/absence patterns, meaning that only the frequency in communities is calculated without counting the individual abundance (Gu et al 2021). Accordingly, to better understand the plant-plant interactions and co-occurrence patterns, precise experimentation, replicated studies across a wider range of species combinations, and analyses considering plant cover or abundance are necessary (Angers- Blondin et al 2018).…”

Section: Plant-species Co-occurrence Pattern and Richnessmentioning

confidence: 99%

Plant co-occurrence patterns and soil environments associated with three dominant plants in the Arctic

Son

2023

J Ecol Environ

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Background:The positive effects of Arctic plants on the soil environment and plant-species co-occurrence patterns are known to be particularly important in physically harsh environments. Although three dominant plants (Cassiope tetragona, Dryas octopetala, and Silene acaulis) are abundant in the Arctic ecosystem at Ny-Ålesund, Svalbard, few studies have examined their occurrence patterns with other species and their buffering effect on soil-temperature and soil-moisture fluctuation. To quantify the plant-species co-occurrence patterns and their positive effects on soil environments, I surveyed the vegetation cover, analyzed the soil-chemical properties (total carbon, total nitrogen, pH, and soil organic matter) from 101 open plots, and measured the daily soil-temperature and soil-moisture content under three dominant plant patches and bare soil. Results: The Cassiope tetragona and Dryas octopetala communities increased the soil-temperature stability; however, the three dominant plant communities did not significantly affect the soil-moisture stability. Non-metric multidimensional scaling separated the sampling sites into three groups based on the different vegetation compositions. The three dominant plants occurred randomly with other species; however, the vegetation composition of two positive co-occurring species pairs (Oxyria digyna-Cerastium acrticum and Luzula confusa-Salix polaris) was examined. The plant species richness did not significantly differ in the three plant communities. Conclusions: The three plant communities showed distinctive vegetation compositions; however, the three dominant plants were randomly and widely distributed throughout the study sites. Although the facilitative effects of the three Arctic plants on increases in the soil-moisture fluctuation and richness were not quantified, this research enables a deeper understanding of plant co-occurrence patterns in Arctic ecosystems and thereby contributes to predicting the shift in vegetation composition and coexistence in response to climate warming. This research highlights the need to better understand plant-plant interactions within tundra communities.

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Oil Spill Impacts on Marine Food Webs: Lessons From Contamination in Tropical Coasts

Cavalcante,

Lima,

de Souza Abessa

et al. 2024

Treatise on Estuarine and Coastal Science (Second Edition)

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Responses of the macrobenthic community to the Dalian Bay oil spill based on co-occurrence patterns and interaction networks

Cited by 5 publications

References 41 publications

Metacommunity analyses show an increase in ecological specialisation throughout the Ediacaran period

Metacommunity analyses show an increase in ecological specialisation throughout the Ediacaran period

Plant co-occurrence patterns and soil environments associated with three dominant plants in the Arctic

Oil Spill Impacts on Marine Food Webs: Lessons From Contamination in Tropical Coasts

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