Altered complementary feeding strategies of the consumers Hydrobia ulvae and Idotea emarginata via passive selectivity

Aberle, Nicole; Malzahn, Arne M.; Grey, Jonathan; Hillebrand, Helmut; Wiltshire, Karen Helen

doi:10.1007/s10152-009-0148-9

Cited by 6 publications

(4 citation statements)

References 44 publications

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“…Animals potentially feeding on the same type of material but collecting it by use of contrasting techniques that probably influence the precise food species selected, e.g. feeding on phytobenthos via ciliated ‘tentacles’, via a rasping radula, or via a pair of cutting jaws, were placed in different categories (see, e.g., Aberle et al ., ). No attached sessile animals were included in the analyses.…”

Section: Methodsmentioning

confidence: 97%

Functional uniformity underlies the common spatial structure of macrofaunal assemblages in intertidal seagrass beds

Barnes

Hendy

2015

Biol J Linn Soc Lond

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Previous work has shown that the intertidal seagrass macrobenthos at three geographically and ecologically disparate localities (in the north-east Atlantic, south-west Indian and south-west Pacific Oceans) possess similar relative species occurrence distributions and uniform species densities. These common features are here demonstrated to be related to the presence in those assemblages of: (1) similar functional diversities and evennesses, (2) the same set of dominant component functional groups, and (3) similar ranked relative occurrence distributions both of those groups and of the component genera within each of the larger groups. The two lower-latitude systems were particularly similar in all these respects. Although sharing the same subset of individual functional groups, however, the relative importance of members of that subset varied from locality to locality and even within a single locality, whilst still maintaining the same ranked relative functional-group occurrence distribution. Therefore the broad structure of available macrobenthic functional roles and the relative occurrences of the component taxa in intertidal seagrass beds (and hence, granted stochastic assembly, the total numbers of taxa supported by unit area) are likely to be linked causally, although the form of the relationship is unclear.

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Section: Methodsmentioning

confidence: 97%

Functional uniformity underlies the common spatial structure of macrofaunal assemblages in intertidal seagrass beds

Barnes

Hendy

2015

Biol J Linn Soc Lond

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“…We suggest that, in their absence, the role of gastropods in controlling algal biomass became more important, as they became more abundant. As confirmed by the diet mixing models, T. fluviatilis feeds on epiphytes and could thus control epiphyte and periphyton growth (Jacoby 1985), while Hydrobiidae can feed on filamentous algae as well as on epiphytes and detritus particles (Casagranda et al 2005;Aberle et al 2009). Though somewhat ignored in previous studies of Baltic eelgrass, gastropod mesograzers seem to play a key role in limiting algal biomass, and the presence of two main groups of mesograzers (i.e., crustaceans and gastropods), each of which are fed upon by separate predatory fish (perch and roach, respectively) could increase the resilience of eelgrass communities in the face of eutrophication, and to the ecosystem as a whole (Jankowska et al 2019).…”

Section: Discussionmentioning

confidence: 96%

Role of food web interactions in promoting resilience to nutrient enrichment in a brackish water eelgrass (Zostera marina) ecosystem

Gagnon

Gustafsson

Salo

et al. 2021

Limnology & Oceanography

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Understanding the ecological interactions that enhance the resilience of threatened ecosystems is essential in assuring their conservation and restoration. Top-down trophic interactions can increase resilience to bottom-up nutrient enrichment, however, as many seagrass ecosystems are threatened by both eutrophication and trophic modifications, understanding how these processes interact is important. Using a combination of approaches, we explored how bottom-up and top-down processes, acting individually or in conjunction, can affect eelgrass meadows and associated communities in the northern Baltic Sea. Field surveys along with fish diet and stable isotope analyses revealed that the eelgrass trophic network included two main top predatory fish species, each of which feeds on a separate group of invertebrate mesograzers (crustaceans or gastropods). Mesograzer abundance in the study area was high, and capable of mitigating the effects of increased algal biomass that resulted from experimental nutrient enrichment in the field. When crustacean mesograzers were experimentally excluded, gastropod mesograzers were able to compensate and limit the effects of nutrient enrichment on eelgrass biomass and growth. Our results suggest that top-down processes (i.e., suppression of algae by different mesograzer groups) may ensure eelgrass resilience to nutrient enrichment in the northern Baltic Sea, and the existence of multiple trophic pathways can provide additional resilience in the face of trophic modifications. However, the future resilience of these meadows is likely threatened by additional local stressors and global environmental change. Understanding the trophic links and interactions that ensure resilience is essential for managing and conserving these important ecosystems and the services they provide.

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“…Secondly, their high tolerance to hypoxia allowed H. ulvae to escape the low oxygen saturation in the marine snow layer, as can be seen by the high survival in the treatment with clean marine snow (Figure 4.5). Thirdly, H. ulvae are grazers and deposit feeders whose diet includes macro-and microalgae and detritus (Aberle et al, 2009) and thus are likely to feed on the marine snow. They will be orally exposed to oil when feeding on oil-contaminated marine snow, as is suggested by the low survival in the treatment with oil-contaminated marine snow: 60% compared to Control (Figure 4.5).…”

Section: Hydrobia Ulvaementioning

confidence: 99%

Marine snow formation during oil spills: additional ecotoxicological consequences for the benthic ecosystem

Eenennaam¹,

Justine²

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Chapter 1 9Other compounds that can occur in oil are sulfur, nitrogen, oxygen, mineral salts, as well as trace metals such as iron, nickel, vanadium, and chromium (Fingas, 2011a). Each oil has a different composition of hydrocarbons and other compounds, making oil from each location chemically unique. This property makes it possible to fingerprint the oil, i.e., chemically analyze the oil for its components to identify a particular sample by its uniqueness of its composition (Davis, 2003). ClassificationsCrude oil can be classified according to different properties. The petroleum industry classifies oils according to the geographical location of the production site (e.g., North Sea, Arabian, Alaskan North Slope, Louisiana, West Texas Intermediate), since each production site produces oil with specific physicochemical properties (Fingas, 2011a). Based on the API density, the oil industry measure of density, oil can be classified as light, medium, heavy, and extra heavy. Generally speaking, light crude oil is more valuable because it yields higher amounts of gasoline and diesel fuel when refined. The sulfur content of oil is used to divide oil into sweet and sour. Sweet crude oil contains less than 0.5% sulfur, while sour crude oil contains more than 1% sulfur (Sheridan, 2006). Sulfur in oil is undesirable because of metal corrosion, the need for additional refining steps, and air pollution from burning of sulfur-rich fuels (Carrales Jr. and Martin, 1975). Oil toxicityOil can have many toxic effects: physical, narcotic, or specific. Physical, or mechanical, oil toxicity is mainly relevant in oil spill situations, when birds and marine mammals are physically covered by oil. These images are usually widely reported in the media coverage, and as such physical toxicity is the most visible type of oil toxicity during oil spills (Shigenaka, 2011). Typically, birds and marine mammals are at risk of physical oil toxicity due to oiling of fur or feathers, which reduces insulating capacity and can lead to death from hypothermia or drowning (Bursian et al., 2017;Peterson et al., 2003). Grooming or preening of oiled fur or feathers can also lead to systemic effects due to ingestion of toxic hydrocarbons (Butler et al., 1988). Sessile invertebrates or plants can also be affected by physical oil toxicity: mass mortality occurred among macroalgae and benthic invertebrates due to smothering in the Exxon Valdez oil spill (Peterson et al., 2003). The oil coating prevents access to sunlight, plant nutrients, and planktonic food for filter feeders (Lee et al., 2015). Especially important for plants is the reduced gas exchange and oxygen depletion, which is linked to microbial oil degradation (Mendelssohn et al., 2012). Salt marshes along the coast of the Gulf of Mexico were heavily impacted by oil during the Deepwater Horizon oil spill in 2010 (Michel et al., 2013). For salt marsh plants, oiling of lower parts or roots is more damaging than oiling of leaves and stems (Lee et al., 2015).Narcotic effects are acute and nonspecific, resul...

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Altered complementary feeding strategies of the consumers Hydrobia ulvae and Idotea emarginata via passive selectivity

Cited by 6 publications

References 44 publications

Functional uniformity underlies the common spatial structure of macrofaunal assemblages in intertidal seagrass beds

Functional uniformity underlies the common spatial structure of macrofaunal assemblages in intertidal seagrass beds

Role of food web interactions in promoting resilience to nutrient enrichment in a brackish water eelgrass (Zostera marina) ecosystem

Marine snow formation during oil spills: additional ecotoxicological consequences for the benthic ecosystem

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