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|a (DE-627)JST029797322
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|a (JST)40603653
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Sakamaki, Takashi
|e verfasserin
|4 aut
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|a Watershed Effects on Chemical Properties of Sediment and Primary Consumption in Estuarine Tidal Flats: Importance of Watershed Size and Food Selectivity by Macrobenthos
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a Computermedien
|b c
|2 rdamedia
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|a Online-Ressource
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|2 rdacarrier
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|a Paniculate organic matter transported from rivers to estuaries (POM R ) varies quantitatively and qualitatively across estuaries; however, a lack of comparative studies poses a challenge in general understanding of responses of estuarine food webs to POM R input. We studied 20 estuarine tidal flats of the Pacific Northwest coast of North America, with watershed areas ranging from 7 to 8000 km². We used carbon-stable isotope (δ¹³C) to test the hypothesis that the nutritional contribution of P0M R to macrobenthos is proportional to relative abundances of POM R in tidal flat sediments. The predominant origin of total POM (TPOM) in tidal flat sediments generally shifted from marine-origin POM (POM M ) to POM R as watershed area increased; however, terrestrial-origin POM R with high C/N predominated sediment TPOM even in estuaries with small watershed areas. Some macrobenthos species assimilated POM sources in proportion to sediment TPOM composition, and incorporated POM R in POM R -predominant sediments. These species were considered to have low food selectivity; however, the relative nutritional contribution of POM R to these macrobenthos was still lower than the fraction of POM R in sediment TPOM. Other species disproportionately utilized POM M and/or benthic microalgae regardless of the relative abundance of P0M R , indicating their high food selectivity. The species-specific, low-or highfood selectivity was likely linked with depositfeeding and filter-feeding, respectively. Hence, our hypothesis was supported conditionally. Our findings indicate that watershed area, relative abundance of POM R in an estuary, and food selectivity of estuarine species are key factors controlling the tightness of linkage between watersheds and estuarine food webs.
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|a © 2010 Springer Science+Business Media, LLC
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650 |
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4 |
|a Physical sciences
|x Earth sciences
|x Geology
|x Petrology
|x Sedimentary petrology
|x Sediments
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650 |
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4 |
|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Bodies of water
|x Estuaries
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650 |
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4 |
|a Physical sciences
|x Earth sciences
|x Geography
|x Land
|x Rangelands
|x Wetlands
|x Tidal flats
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4 |
|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Geologic provinces
|x Structural basins
|x Watersheds
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650 |
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4 |
|a Biological sciences
|x Biology
|x Botany
|x Marine botany
|x Phycology
|x Algae
|x Microalgae
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650 |
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4 |
|a Biological sciences
|x Ecology
|x Ecological processes
|x Ecosystem dynamics
|x Trophic dynamics
|x Trophic relationships
|x Food webs
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650 |
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4 |
|a Biological sciences
|x Ecology
|x Ecosystems
|x Aquatic ecosystems
|x Marine ecosystems
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650 |
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4 |
|a Physical sciences
|x Chemistry
|x Chemical elements
|x Nonmetals
|x Carbon
|x Carbon isotopes
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650 |
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4 |
|a Applied sciences
|x Food science
|x Foodstuffs
|x Food
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650 |
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4 |
|a Biological sciences
|x Ecology
|x Ecosystems
|x Aquatic ecosystems
|x Freshwater ecosystems
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|a research-article
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700 |
1 |
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|a Shum, Jennifer Y. T.
|e verfasserin
|4 aut
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700 |
1 |
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|a Richardson, John S.
|e verfasserin
|4 aut
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773 |
0 |
8 |
|i Enthalten in
|t Ecosystems
|d Springer Science + Business Media
|g 13(2010), 2, Seite 328-337
|w (DE-627)270937773
|w (DE-600)1478731-3
|x 14350629
|7 nnns
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773 |
1 |
8 |
|g volume:13
|g year:2010
|g number:2
|g pages:328-337
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856 |
4 |
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|u https://www.jstor.org/stable/40603653
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|d 13
|j 2010
|e 2
|h 328-337
|