Incorporation of Exotic Spartina alterniflora into Diet of Deposit-Feeding Snails in the Yangtze River Estuary Salt Marsh: Stable Isotope and Fatty Acid Analyses

Wang, Sikai; Chu, Tianjiang; Huang, Danqing; Li, Bo; Wu, Jihua

doi:10.1007/s10021-013-9743-3

Cited by 27 publications

(11 citation statements)

References 46 publications

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“…In spite of differences in species assemblages and different invasion histories (10–30 years), S. alterniflora was a major organic carbon source for all benthic macrofauna within a short time following the invasion in all three sampling regions. Similar results have been reported for marshes in Yangtze River estuary where both crabs and detritus‐feeding snails consume a large proportion of S. alterniflora detritus (Qin et al., ; Wang, Chu, Huang, Li, & Wu, ). The fast‐growing S. alterniflora exhibited high productivity and a well‐developed underground root system (Li et al., ), which could inhibit the import and availability of allothogenic food sources by reducing tidal flow and producing more detritus (Neira, Grosholz, Levin, & Blake, ; Neira, Levin, & Grosholz, ; Neira, Levin, Grosholz, & Mendoza, ).…”

Section: Discussionsupporting

confidence: 83%

“…Furthermore, the dense structure of S. alterniflora could influence the growth and production of benthic microalgae by reducing the availability of light (Brusati & Grosholz, 2006;Neira et al, 2005). The availability of different food sources could explain the effect of S. alterniflora on some non-selective feeding crabs and gastropods (Qin et al, 2010;Wang et al, 2014). In addition, the nutritional quality of the primary producers in coastal wetlands could partially influence the energy flow of the ecosystem (Dibble & Meyerson, 2014).…”

Section: Effect Of Invasive Spartina Alterniflora On the Diets Of Mmentioning

confidence: 99%

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Restoration of native mangrove wetlands can reverse diet shifts of benthic macrofauna caused by invasive cordgrass

Feng

Huang

Chen

et al. 2017

Journal of Applied Ecology

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Ecological replacement using native mangrove species combined with physical treatments has become an effective method in controlling the spread of invasive cordgrass Spartina alterniflora. To re‐establish ecosystem functions, trophic interactions between macrofauna and their potential food resources must be considered during the restoration process. Here, we examined the changes in the diets of macrofauna in three restored mangrove ecosystems with different invasion histories following the removal of S. alterniflora in southern China. Carbon and nitrogen stable isotope ratios for dominant macrofauna, as well as their potential food sources, were analysed. The relative contributions of the different carbon sources to the diets of benthic macrofauna and isotopic niche width, including convex hull areas and standard ellipse areas of the macrofaunal community, were then calculated and compared among sampling sites in each region. Our results indicated that Spartina‐derived detritus contributed to >80% of the organic carbon sources of dominant macrofauna in the S. alterniflora communities in all three regions. Spartina alterniflora communities had lower convex hull areas and standard ellipse areas than natural mangrove forests, indicating significant resource competition among different consumer populations. Replacing S. alterniflora with the native mangrove species Kandelia obovata could reverse the diets of these macrofaunal species, resulting in a shift from homogeneous Spartina‐dominated diets to more heterogeneous algae‐based diets. It could take several decades to restore food web interactions to a pre‐impacted state. Even the diets of macrofauna in mature mangrove (>40 years) remained affected by the Spartina‐derived organic matter. Synthesis and applications. Our study reveals that the ecological replacement of invasive Spartina alterniflora using native mangrove species could restore food web function gradually. However, this removal and replacement approach is a long process and requires significant manpower and resources. Furthermore, the native ecosystem will continue to be influenced by the cordgrass as long as large areas of wetland nearby are occupied by S. alterniflora. Consequently, preventing the colonization of S. alterniflora should be a priority for coastal ecosystem management in southern China.

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Section: Discussionsupporting

confidence: 83%

Section: Effect Of Invasive Spartina Alterniflora On the Diets Of Mmentioning

confidence: 99%

Restoration of native mangrove wetlands can reverse diet shifts of benthic macrofauna caused by invasive cordgrass

Feng

Huang

Chen

et al. 2017

Journal of Applied Ecology

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“…Understanding how energy moves through food webs helps answer important questions such as how ecosystem structure influences function, whether adjacent ecosystems are linked and exchange nutritional subsidies, and how ecosystems respond to man‐made alterations . Biomarkers are measurable elemental and molecular signatures in consumer tissues that provide dietary information and can be used to trace the flow of matter and energy in food webs .…”

Section: Introductionmentioning

confidence: 99%

A multi‐biomarker approach supports the use of compound‐specific stable isotope analysis of amino acids to quantify basal carbon source use in a salt marsh consumer

Johnson

Olin

Polito

2019

Rapid Comm Mass Spectrometry

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Rationale Determining the flow of energy from primary producers to higher trophic levels in complex systems remains an important task for ecologists. Biomarkers can be used to trace carbon or energy sources contributing to an organism's tissues. However, different biomarkers vary in their ability to trace carbon sources based on how faithfully they transfer between trophic levels. Comparing emerging biomarker techniques with more commonly used techniques can demonstrate the relative efficacy of each in specific systems. Methods Two common biomarker techniques, fatty acid analysis (FAA) and bulk stable isotope analysis (SIA), and one emerging biomarker technique, compound‐specific stable isotope analysis of amino acids (CSIA‐AA), were compared to assess their ability to characterize and quantify basal carbon sources supporting the seaside sparrow (Ammodramus maritimus), a common salt marsh species. Herbivorous insect and deposit‐feeding fiddler crab biomarker values were analyzed as proxies of major terrestrial and aquatic basal carbon sources, respectively. Results All three biomarker techniques indicated that both terrestrial and aquatic carbon sources were important to seaside sparrows. However, FAA could only be evaluated qualitatively, due to a currently limited understanding of trophic modification of fatty acids between primary producer and this consumer's tissues. Quantitative stable isotope (SIA or CSIA‐AA) mixing models predicted nearly equal contributions of terrestrial and aquatic carbon sources supporting seaside sparrows, yet estimates based on CSIA‐AA had greater precision. Conclusions These findings support the use of CSIA‐AA as an emerging tool to quantify the relative importance of basal carbon sources in salt marsh consumers. Integrating multiple biomarker techniques, with their differing benefits and limitations, will help to constrain models of carbon and energy flow in future ecosystem studies.

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“…High ratios of DHA/EPA and 16:1ω7/16:0 are commonly used as indicators of preferential feeding on dinoflagellates or diatoms, respectively (Dunstan et al 1993, Kharlamenko et al 2001. Because diatoms often lack C 18 polyunsaturated FA (C 18 -PUFA), the presence of these FAs in consumers indicates other food sources, such as vascular plants for which 18:2ω6, 18:3ω3 and 24:0 are considered indicator FAs (Bergamino et al 2014, Wang et al 2014. Here, these FAs could, for instance, relate to the detritus of salt-marsh vegetation or to allochtonous terrestrial matter.…”

Section: Fatty Acidsmentioning

confidence: 99%

Trophodynamics of estuarine intertidal harpacticoid copepods based on stable isotope composition and fatty acid profiles

Cnudde

Moens

Werbrouck

et al. 2015

Mar. Ecol. Prog. Ser.

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Incorporation of Exotic Spartina alterniflora into Diet of Deposit-Feeding Snails in the Yangtze River Estuary Salt Marsh: Stable Isotope and Fatty Acid Analyses

Cited by 27 publications

References 46 publications

Restoration of native mangrove wetlands can reverse diet shifts of benthic macrofauna caused by invasive cordgrass

Restoration of native mangrove wetlands can reverse diet shifts of benthic macrofauna caused by invasive cordgrass

A multi‐biomarker approach supports the use of compound‐specific stable isotope analysis of amino acids to quantify basal carbon source use in a salt marsh consumer

Trophodynamics of estuarine intertidal harpacticoid copepods based on stable isotope composition and fatty acid profiles

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