Life Under Exceptional Conditions—Isotopic Niches of Benthic Invertebrates in the Estuarine Maximum Turbidity Zone

Taupp, Thomas; Hellmann, Claudia; Gergs, René; Winkelmann, Carola; Wetzel, Markus A.

doi:10.1007/s12237-016-0163-4

Cited by 8 publications

(7 citation statements)

References 59 publications

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“…There are fewer studies evaluating the niche partitioning in invertebrates, mostly focusing on deposit-feeders, filter-feeders, opportunistic predators and grazers (e.g. 28 – 30 ). Studies on inter- and intraspecific competition in sympatric, highly mobile and obligatory carnivorous invertebrates such as the majority of cephalopods are rare 31 – 33 .…”

Section: Introductionmentioning

confidence: 99%

Diet and life history reduce interspecific and intraspecific competition among three sympatric Arctic cephalopods

Golikov

Ceia

Sabirov

et al. 2020

Sci Rep

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Trophic niche and diet comparisons among closely sympatric marine species are important to understand complex food webs, particularly in regions most affected by climate change. Using stable isotope analyses, all ontogenetic stages of three sympatric species of Arctic cephalopods (genus Rossia) were studied to assess inter- and intraspecific competition with niche and diet overlap and partitioning in West Greenland and the Barents Sea. Seven traits related to resource and habitat utilization were identified in Rossia: no trait was shared by all three species. High boreal R. megaptera and Arctic endemic R. moelleri shared three traits with each other, while both R. megaptera and R. moelleri shared only two unique traits each with widespread boreal-Arctic R. palpebrosa. Thus all traits formed fully uncrossing pattern with each species having unique strategy of resource and habitat utilization. Predicted climate changes in the Arctic would have an impact on competition among Rossia with one potential ‘winner’ (R. megaptera in the Barents Sea) but no potential ‘losers’.

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Section: Introductionmentioning

confidence: 99%

Diet and life history reduce interspecific and intraspecific competition among three sympatric Arctic cephalopods

Golikov

Ceia

Sabirov

et al. 2020

Sci Rep

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“…Godbold et al () explored niche separation in deposit‐feeding echinoderms and documented a high degree of niche overlap at shallow depths compared to that in the deep sea and claimed that more plentiful food decreased interspecific competition for food resources and reduced the potential for fine‐scale niche separation and feeding selectivity in coastal waters. Disturbance can keep the populations below carrying capacity and thus release species competition pressure and niche specialization (Taupp et al ). The opposite effects of high disturbance (potentially releasing niche specialization; Taupp et al ) and low food availability (potentially increasing niche specialization; Godbold et al ) in a glacial bay may have overlapped, and in effect, both systems ( INNER and OUTER ) exhibited similar levels of species niche separation.…”

Section: Discussionmentioning

confidence: 99%

“…Disturbance can keep the populations below carrying capacity and thus release species competition pressure and niche specialization (Taupp et al ). The opposite effects of high disturbance (potentially releasing niche specialization; Taupp et al ) and low food availability (potentially increasing niche specialization; Godbold et al ) in a glacial bay may have overlapped, and in effect, both systems ( INNER and OUTER ) exhibited similar levels of species niche separation.…”

Section: Discussionmentioning

confidence: 99%

Is the trophic diversity of marine benthic consumers decoupled from taxonomic and functional trait diversity? Isotopic niches of Arctic communities

Włodarska‐Kowalczuk

Aune

Michel

et al. 2019

Limnology & Oceanography

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It is predicted that a diverse array of functional traits in species‐rich assemblages can lead to strong resource partitioning among coexisting species and moderate a wider spectrum of resource use. We compared two benthic communities in an Arctic fjord: a species‐rich community (in an outer basin) and an impoverished community (in a glacially impacted bay) and explored (1) if high species richness was translated into high functional trait richness and (2) if high taxonomic and functional diversity promoted high trophic diversity in terms of resource use (indicated by isotopic niche measures). We documented higher functional trait richness in the outer basin (computed based on traits describing feeding mode, mobility, food source, body size and life habit), but the area occupied by consumers in the δ15N vs. δ13C iso‐space (a proxy for total trophic resource use) did not differ between the two sites. A wide array of functional traits used to acquire food may extend the benthic community trophic niche spatially (where and how animals forage) without impacting the isotopic niche breadth (in this system, mostly reflecting “what animals feed on”) due to the relatively homogenous distribution of isotopic characteristics of detritus pool across vertical scales in marine sediments. Moreover, this trend could indicate that a species‐poor community tends to exploit all the available food items, possibly due to the low food availability for primary consumers in a glacially impacted environment. Communities in glacial bays could therefore be particularly sensitive to future changes in glacial inputs and associated organic matter fluxes.

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“…The Σ 15 PAH concentrations decreased as the overlaying seawater salinity increased sharply from sites X20 to X23. Figure 2 shows the dramatic variation in salinity between sites X20 and X23, which may be attributed to the turbidity maximum zone (TMZ) in this area (Taupp et al 2017). Hermes and Sikes (2016) reported that the maximum value of particulate organic carbon (POC) occurred in the water of TMZ (Hermes &Sikes 2016).…”

Section: Concentration and Distribution Of Pahs In Sedimentmentioning

confidence: 99%

From headwaters to estuary: distribution, sources, and ecological risk of polycyclic aromatic hydrocarbons in an intensively human-impacted river, China

Zhen

Liu

et al. 2018

Environ Sci Pollut Res

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Located in the Shandong Province, North China, the Xiaoqing River is heavily contaminated by industrial wastewater and domestic sewage. However, it plays a significant role with regard to irrigation for agriculture in the river basin. In this study, spatial distribution, sources, and the ecological risk of aqueous polycyclic aromatic hydrocarbons (PAHs) in the Xiaoqing River Basin were investigated from the headwaters to the estuary. Fifteen USEPA priority PAHs (except naphthalene) were quantified in water particulate and soluble phases and in sediment samples. Σ 15 PAHs concentrations in the sediment varied from 17.15 to 3808.01 ng/g dry weight (dw), with an average of 988.72 ng/g dw, suggesting severe pollution of the Xiaoqing River in comparison with other rivers worldwide. The composition of PAHs was characterized by the high abundance of 4-ring and 5ring PAHs in sediments and 2-ring and 3-ring PAHs in water. Industrial wastewater is a significant source of PAHs. In the river section, point source was the main factor affecting the distribution of PAHs, while in the estuary region, estuarine turbidity maximum zone (ETM), riverine flow and discharge, and its hydrodynamic parameters play more key roles on PAH levels. Molecular diagnostic ratios have proved that PAHs in sediments were derived from mixed sources, primarily a combination of several combustion processes. Toxicity equivalency concentrations (TEQs) and Ecological risk assessment by Sediment Quality Guidelines indicated that PAHs in sediments might have certain unfavorable effects on ecosystems in certain sites.

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Life Under Exceptional Conditions—Isotopic Niches of Benthic Invertebrates in the Estuarine Maximum Turbidity Zone

Cited by 8 publications

References 59 publications

Diet and life history reduce interspecific and intraspecific competition among three sympatric Arctic cephalopods

Diet and life history reduce interspecific and intraspecific competition among three sympatric Arctic cephalopods

Is the trophic diversity of marine benthic consumers decoupled from taxonomic and functional trait diversity? Isotopic niches of Arctic communities

From headwaters to estuary: distribution, sources, and ecological risk of polycyclic aromatic hydrocarbons in an intensively human-impacted river, China

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