Loss of surficial sedimentary carbon stocks in seagrass meadows subjected to intensive clam harvesting

Román, Marta San; Santos, Carmen B. de los; Román, Salvador; Santos, Rui; Troncoso, Jesús Souza; Vázquez, Elsa; Olabarria, Celia

doi:10.1016/j.marenvres.2022.105570

Cited by 12 publications

(4 citation statements)

References 47 publications

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“…The introduction and exploitation of non-native species, such as the Manila clam, in European estuaries, creates new ecological, social and economic challenges that need to be analysed in depth in order to design appropriate management strategies for sustainability (Coelho et al, 2021). On the one hand, the intense harvesting of Ruditapes philippinarum, and other infaunal shellfish resources, has negative impacts on the native local benthic communities and on Zostera meadows in Iberian estuaries (Romań et al, 2022a), driving their decline in some estuaries (Alexandre et al, 2005;Cabaco et al, 2005;Garmendia et al, 2017;Vieira et al, 2022). Besides the Iberian case, the negative impact of clam harvesting on seagrass meadows, particularly concerning their biomass and shoot density, is generalized worldwide (Peterson et al, 1987;Boese, 2002;McLaughlin et al, 2007;Ferriss et al, 2019;Herrera et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Exploring the newly emerging effects of native seagrasses on survival and growth of non-native juvenile clams

Galván,

Puente

2023

Front. Mar. Sci.

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The Manila clam (Ruditapes philippinarum) has been introduced into the Atlantic European coast for commercial exploitation. In this region, the population dynamics of this clam species may be determined by the interaction with the native dwarf eelgrass (Zostera noltei). We performed an experiment in the tidal flats of an estuary located in northern Spain to analyse the interaction between Z. noltei and juvenile Manila clams. Based on existing knowledge, it was hypothesised that seagrasses act as a nursery protecting juveniles from predation, which is an important cause of natural mortality, and that seagrass density influences the survival, growth and condition of clams. The results indicate that the effects of seagrasses on juvenile clams depends on shoot density, which mainly determine the relative prevalence of positive versus negative interactions. Dense seagrass meadows protect juvenile clams from predation, likely decreasing their visibility and reducing the efficiency of predators. However, in these dense meadows, a decline in the condition of clams was also observed, although not in shell growth. This decline can be due to the fact that food supply in dense meadows is slow and does not fulfil the replenishment rates required by filter-feeding organisms or because competition for space with the seagrass causes stress. Clams are larger in populations where predator access is prevented, possibly indicating selective predation on larger organisms when this interaction is allowed. The knowledge gained from this experiment is of great interest for analysing possible future trends in clam populations and the derived social implications given its high economic value.

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Section: Discussionmentioning

confidence: 99%

Exploring the newly emerging effects of native seagrasses on survival and growth of non-native juvenile clams

Galván,

Puente

2023

Front. Mar. Sci.

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“…This caused not only the increase of carbon stock emissions during the six consecutive years, but also had a large impact on marine food webs, including fish communities, invertebrates, birds and marine mammals (Serrano et al, 2021). Additional anthropogenic pressure with physical disturbance on the sedimentary carbon stocks of seagrasses (like the one caused by fishery-related activities) can cause a decrease of up to 85% in the seagrass carbon stocks (Romań et al, 2022). Therefore, the precautionary approach should be considered when designing management plans aimed at the use of the space where seagrasses and human activities overlap.…”

Section: Discussionmentioning

confidence: 99%

Trade-Offs and Synergies Between Seagrass Ecosystems and Fishing Activities: A Global Literature Review

et al. 2022

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Seagrass ecosystems support human well-being by delivering a wide range of ecosystem services. Particularly important is the significant role they play in food provisioning by supporting fisheries worldwide. Despite their socio-economic importance, it is only recently when they have been considered as important social-ecological systems worldwide. Research focused on the interactions between seagrasses and human activities have been understudied and never addressed from a global approach, even though this knowledge is essential to create relevant policy and management plans, and to promote governance systems, which consider fishers’ needs and rights. Thus, we carried out a global systematic review on trade-offs and/or synergies between seagrasses and fishing activities, aiming to analyse the current state of the art on these interactions, to identify potential gaps in knowledge, and to pinpoint key research priorities. We found a total of 94 publications assessing the relationship between seagrass ecosystems and fisheries, which have tripled between 2001-2021, being most of them empirical studies (90%) with ecological scope (a total of 68). Socioeconomic studies (3%) on the subject were identified as a knowledge gap. Most studies (72%) were carried out in northern hemisphere countries, with an underrepresentation of studies in tropical regions. The studies reporting trade-off (a total of 69) interactions almost tripled those reporting synergies (a total of 31) between seagrass ecosystems and fisheries. Mechanical damage to seagrasses by fishing gear is the main source (51%) of trade-offs, followed by overfishing (28%), while aquaculture cages’ emissions (20%) are also a relevant source of trade-offs. Seafood market demand and conflicts of use were the main drivers for trade-offs. When assessing synergistic interactions, most studies (27 out of 31) reported a larger abundance or recruitment of species with commercial interest mediated by seagrass habitat provision. Globally, seagrass ecosystems are mainly affected by industrial and small-scale fisheries, including aquaculture and shellfisheries, and to a lesser extent, by recreational fisheries. Fisheries management system is not specified in more than half (53) of the reviewed publications, which represents a key knowledge gap with implications for sustainable management. Nevertheless, we document a fast increase in studies covering fishery-seagrass interactions, which, if accompanied by better reporting of the nature of the interactions and the socio-economic context of the fishery, would help improve the sustainable management of both systems.

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“…Nurdiawati A and Urban F [41] analyzed various technological trajectories and key policies for decarbonizing energy-intensive industries and concluded that it may be technically feasible to strongly decarbonize energyintensive industries by 2045, given financial and political support. At the same time, carbon storage by plants is explored, for example, Roman M, de los Santos CB, Roman S et al [42] researched sea grass carbon stocks and influence factors.…”

Section: Introductionmentioning

confidence: 99%

A Multi-Attribute Approach for Low-Carbon and Intensive Land Use of Jinan, China

et al. 2023

Land

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This paper establishes an evaluation system based on the low-carbon intensive land use in Jinan city from 2010 to 2017 and uses a multi-attribute approach named grey fuzzy integral to build the evaluation model. In this model, based on the Mobius transformation coefficient of subjective and objective weights of index factors and the interaction degree between index factors, 2-additive fuzzy measures can be obtained; therefore, evaluation of low-carbon and intensive land use in Jinan city is processed by combining the grey correlation degree and Choquet fuzzy integral. The results show that in the study period, land input intensity, land use degree, land output benefit and land sustainability in Jinan city all show a good upward trend, but the low-carbon land use level of has been in a declining state. Although there is a good development trend of low-carbon and intensive land use in Jinan, the state is not stable. A Low-carbon and intensive land use pattern will not be achieved completely overnight, and it is bound to be a dynamic game process.

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Loss of surficial sedimentary carbon stocks in seagrass meadows subjected to intensive clam harvesting

Cited by 12 publications

References 47 publications

Exploring the newly emerging effects of native seagrasses on survival and growth of non-native juvenile clams

Exploring the newly emerging effects of native seagrasses on survival and growth of non-native juvenile clams

Trade-Offs and Synergies Between Seagrass Ecosystems and Fishing Activities: A Global Literature Review

A Multi-Attribute Approach for Low-Carbon and Intensive Land Use of Jinan, China

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