Stable isotopic structure of aquatic ecosystems

Wada, Eitaro; Kabaya, Yuko; Kurihara, Yasushi

doi:10.1007/bf02703081

Cited by 62 publications

(44 citation statements)

References 18 publications

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“…Ruckelshaus et al (1993) found that growth and 6I3C values of blue mussels corresponded to differences in the abundance and 613C values of local producers, suggesting that Padilla Bay, Washington, USA, mussels rely primarily on local sources of carbon for food. Examination of 613C and 6I5N in biota from the Nanakita River estuary (Japan) revealed a strong marine primary production component for marine consumers in lower reaches of this watershed and contributions of vascular marsh plant Deegan & Garritt: S p a t~a l varla lblllty ~n estuarine food webs 4 3 material to suspension and surface deposit feeders (Wada et al 1993). The importance of fresh marsh and oligohaline phytoplankton to common estuarine species in the upper estuary was unexpected.…”

Section: Discussionmentioning

confidence: 97%

Evidence for spatial variability in estuarine food webs

La¹,

Garritt²

1997

Mar. Ecol. Prog. Ser.

438

296

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ABSTRACT. The importance of phytoplankton, benthic microalgae, fresh and salt marsh emergent plants, and terrestrial organic matter to the estuarine food w e b of Plum Island Sound, Massachusetts, USA, was evaluated using the stable isotopes of carbon, nitrogen and sulfur. Three distinct regions of the estuary were examined: the oligohaline upper estuary with high freshwater inputs and fringing fresh marsh, the middle estuary with extensive salt marsh, and the lower estuary with a greater proportion of open bay and a direct connection to open ocean. In each region, sources of organic matter for pelaglc and benthic aquatlc consumers were compared with the range of organic matter sources available in the entire estuary. Consumers in all regions relied most heavily on locally produced organic matter. In the upper estuary, most consumers had 613C values of -29 to -2 1 ' L and 634S values of about 8?L, whlch indicated dependence on a mixture of fresh marsh emergent vegetation and phytoplankton from the oligohaline region. In the middle and lower estuary, consumers had 613C values of -23 to -1 5 ' k and 634S values of 5 to 154., resembling a mixture of Spal-tina spp., benthic m~croalgae and marine phytoplankton. Terrestrial organic matter was of minimal importance in the upper estuary and was not evident in the food webs of the middle and lower estuary. The isotopic values of pelagic consumers reflected a greater dependence on phytoplankton than those of benthic consumers, which were closer to fresh or salt marsh emergent vegetation and benthic microalgae. Several of the patterns revealed by examination of organic matter sources for the food w e b of the Plum Island Sound estuary have implications for our general understanding of estuarine food webs. First, while there is substantial spatial heterogeneity in organic matter sources within a single estuary, consumers tend to utilize sources of organic matter produced In the same region of the estuary in which they reside. Second, consumer dependence on terrestrially derived riverine organic matter is minimal, even in the relatively small region of the estuary where ~t s availability is the highest Third, benthic and p e l a g~c organisms rely on different mixes of organic matter sources.

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Section: Discussionmentioning

confidence: 97%

Evidence for spatial variability in estuarine food webs

La¹,

Garritt²

1997

Mar. Ecol. Prog. Ser.

438

296

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“…To know whether this similarity could be general, we reviewed similar analysis results obtained from different types of ecosystems, a tidal flat system (Wada et al 1993) and a decomposing system of wood and decomposing fungi (Kohzu et al 2005) to compare with the three systems. Although linear relationships were observed, each food chain in Gamoh tidal flat (Miyagi prefecture, Japan) and wood decomposing fungi exhibited quite different ratio of trophic fractionation of carbon and nitrogen isotopes (Dd 13 C/Dd 15 N).…”

Section: Does Each Ecosystem Have a Specific Ratio Of Ddmentioning

confidence: 99%

“…From the comparison, we found two clear contrasting features for these two systems. In Gamoh tidal flat, little carbon trophic fractionation was observed along the food chain (Wada et al 1993). The reason why we observed such small carbon trophic fractionation in the tidal flat has not been clarified, but it might be related with its eutrophic condition and rather complicated food webs.…”

Section: Does Each Ecosystem Have a Specific Ratio Of Ddmentioning

confidence: 99%

“…Including offshore food webs, it is documented that the d 13 C enrichment (Dd 13 C)/TL (TL = trophic level; plant TL = 1.0) lacked its consistency ranging from 0 to 1.5 & (Fry and Sherr 1984;Rau et al 1983;McConnaughey and McRoy 1979). Vander Zanden and Rasmussen (2001) Meanwhile, comparison among more various aquatic systems suggests that Dd 13 C/TL has relatively small values in lakes and coastal systems (Post 2002;Wada et al 1993), while it would become larger in pelagic systems in the ocean (Wada et al 1987). In fact, Wada et al (1987) reported significantly high trophic fractionation of Dd 13 C/TL along a food chain in the Antarctic Ocean.…”

Section: Introductionmentioning

confidence: 99%

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Possible ideas on carbon and nitrogen trophic fractionation of food chains: a new aspect of food‐chain stable isotope analysis in Lake Biwa, Lake Baikal, and the Mongolian grasslands

Wada

Ishii

Aita

et al. 2013

Ecological Research

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“…The av er age d 15 N of all plant ma te ri als in the la goon was 8.6 ± 3.6‰ (av er age ± SD, n = 7; Wada et al, 1993). The or i gin of or ganic mat ter in sed i ments can be di ag nosed us ing sta ble car bon and ni tro gen iso topes fol low ing Meyers (1994) who rec og nized four dis tinc tive suites in plants.…”

Section: Interpretation and Discussionmentioning

confidence: 95%

Stable carbon and nitrogen isotopes and elemental composition and origin of organic matter from the Euphrates, Injana and Dibdibba formations in Iraq: discrimination between marine and terrestrial environments

Awadh

2014

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Awadh, S.M., 2014. Sta ble car bon and ni tro gen iso topes and el e men tal com po si tion and or i gin of or ganic mat ter from the Neo gene Eu phra tes, Injana and Dibdibba for ma tions in Iraq: dis crim i na tion be tween ma rine and ter res trial en vi ron ments. Geo log i cal Quar terly, 58 (4): 729-736, doi: 10.7306/gq.1174 Three Neo gene sed i men tary for ma tions re flect ing dif fer ent depositional en vi ron ments have been in ves ti gated for the purpose of di ag nos ing the iso to pic source of the sed i men tary or ganic mat ter and their palaeoenvironmental sig nif i cance in discrim i nat ing be tween ma rine and ter res trial en vi ron ments. One of these for ma tions is com posed of car bon ate and marl of a shal low-ma rine en vi ron ment (Eu phra tes For ma tion), and the other for ma tions are com posed of a clastic ter res trial (fluviatile) de pos its with some dif fer ences in the depositional con di tions (Injana and Dibdibba for ma tions). The iso to pic d 13 C%, d 15 N% val ues, or ganic car bon (OC) and to tal ni tro gen con tents, and atomic C/N ra tios are used as ev i dence of depositional en vi ronment. Av er age d 13 C val ues (in ‰) for the Dibdiba, Injana and Eu phra tes for ma tions are -25.4, -25.7 and -24.5, re spec tively; av er age d 15 N val ues (in ‰) are 4.44, 5.24 and 7.24 and av er age OC (in wt.%) is 0.13, 0.3 and 1.1, re spec tively. A sig nif i cant vari a tion in the sta ble car bon and ni tro gen iso tope com po si tions be tween flu vial and ma rine de pos its was re corded. The d 13 C, d 15 N and C/N val ues in di cate that the or ganic mat ter in the Eu phra tes For ma tion is of ma rine or i gin, whereas it is of terres trial or i gin (fluviatile) in the Injana and Dibdibba for ma tions. The C/N atomic val ues are mostly high in the Injana (37) and Dibddiba for ma tions (51), sug gest ing greater in put and/or pres er va tion of ter res trial or ganic mat ter de rived from land plants; the shal low-ma rine en vi ron ment (Eu phra tes For ma tion) was char ac ter ized by a low C/N ra tio (9) due to the al gal-de rived organic mat ter with lim ited in put of ter res trial or ganic mat ter.Key words: sta ble car bon iso topes, sta ble ni tro gen iso topes, or ganic mat ter, ma rine en vi ron ment, ter res trial en vi ron ment, palaeoenvironment, Iraq.

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Stable isotopic structure of aquatic ecosystems

Cited by 62 publications

References 18 publications

Evidence for spatial variability in estuarine food webs

Evidence for spatial variability in estuarine food webs

Possible ideas on carbon and nitrogen trophic fractionation of food chains: a new aspect of food‐chain stable isotope analysis in Lake Biwa, Lake Baikal, and the Mongolian grasslands

Stable carbon and nitrogen isotopes and elemental composition and origin of organic matter from the Euphrates, Injana and Dibdibba formations in Iraq: discrimination between marine and terrestrial environments

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