Human impacts and changes in the coastal waters of south China

Wang, Linlin; Li, Qiang; Bi, Hongsheng; Mao, Xufei

doi:10.1016/j.scitotenv.2016.03.216

Cited by 23 publications

(11 citation statements)

References 47 publications

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“…These factors include: 1) pre-exposure to low p CO 2 condition in their habitats and inside brood chamber. Coastal environments in Hong Kong can experience seasonal low pH as low as 7.7 pH unit 42 , 43 . Crepidula onyx brood their larvae in brood chambers for 2 to 4 weeks prior to release, and pH therein could be low, e.g., pH 7.0 in Ostrea chilensis 42 and 6.4 in the calyptraeid Crepipatella dilatata 44 ; 2) presence of a large energy reserve from yolk, e.g., Gallager and Mann 45 showed that survival of bivalve larvae positively correlated with lipid content in eggs and varied between broodstock.…”

Section: Discussionmentioning

confidence: 99%

“…onyx , the larvae were exposed to three pH levels (control pH ≈ 8.01, medium pH ≈ 7.71 and low pH ≈ 7.38) and fed with algae cultured at different pH, hereinafter referred to as diet, which had different nutritional qualities as indicated by C:N ratio ( see algal culturing ). These pH levels were chosen to represent both present day extreme values in the coastal environments (pH NBS 7.7–8.2 in Hong Kong 42 , 43 and the native habitat of C . onyx where upwelling occurs (with values < pH 7.75) 57 , as well as the predicted surface pH reduction of 1.4 units by 2300 58 .…”

Section: Methodsmentioning

confidence: 99%

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Resilience of the larval slipper limpet Crepidula onyx to direct and indirect-diet effects of ocean acidification

Maboloc

Chan

2017

Sci Rep

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Ocean acidification (OA) is known to directly impact larval physiology and development of many marine organisms. OA also affects the nutritional quality and palatability of algae, which are principal food sources for many types of planktonic larvae. This potential indirect effect of OA via trophic interactions, however, has not been fully explored. In this study, veligers of Crepidula onyx were exposed to different pH levels representing the ambient (as control) and low pH values (pH 7.7 and pH 7.3) for 14 days, and were fed with Isochrysis galbana cultured at these three respective pHs. pH, diet, nor their interactions had no effect on larval mortality. Decrease in pH alone had a significant effect on growth rate and shell size. Structural changes (increased porosity) in larval shells were also observed in the low pH treatments. Interactions between acidification and reduced diet quality promoted earlier settlement. Unlike other calcifying molluscs, this population of slipper limpets introduced to Hong Kong in 1960s appeared to be resilient to OA and decreased algal nutritional value. If this robustness observed in the laboratory applies to the field, competition with native invertebrates may intensify and this non-native snail could flourish in acidified coastal ecosystems.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Resilience of the larval slipper limpet Crepidula onyx to direct and indirect-diet effects of ocean acidification

Maboloc

Chan

2017

Sci Rep

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“…For both generations studied, three nominal pH levels (control pH 8.0, medium pH 7.7, and low pH 7.3) were used, and two additional pH levels (extreme 6.4 and 7.0) were added during F 2 larval culture with the purpose of identifying a breakpoint (Figure 1). The first three pH levels were chosen to represent both present‐day average and extreme values at the collection site (pH 7.7–8.2; Pecquet et al, 2017; Wang et al, 2016) and the predicted average sea surface pH in 2100 and 2300 (Caldeira & Wickett, 2005). These pH levels corresponded to ~pCO 2 levels ~470, 870, 2300, 4300, 21,000 µatm, respectively (Table S1).…”

Section: Methodsmentioning

confidence: 99%

Parental whole life cycle exposure modulates progeny responses to ocean acidification in slipper limpets

Maboloc

Chan

2021

Global Change Biology

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Multigenerational exposure is needed to assess the evolutionary potential of organisms in the rapidly changing seascape. Here, we investigate if there is a transgenerational effect of ocean acidification exposure on a calyptraeid gastropod such that long‐term exposure elevates offspring resilience. Larvae from wild type Crepidula onyx adults were reared from hatching until sexual maturity for over 36 months under three pH conditions (pH 7.3, 7.7, and 8.0). While the survivorship, growth, and respiration rate of F1 larvae were unaffected by acute ocean acidification (OA), long‐term and whole life cycle exposure significantly compromised adult survivorship, growth, and reproductive output of the slipper limpets. When kept under low pH throughout their life cycle, only 6% of the F1 slipper limpets survived pH 7.3 conditions after ~2.5 years and the number of larvae they released was ~10% of those released by the control. However, the F2 progeny from adults kept under the long‐term low pH condition hatched at a comparable size to those in medium and control pH conditions. More importantly, these F2 progeny from low pH adults outperformed F2 slipper limpets from control conditions; they had higher larval survivorship and growth, and reduced respiration rate across pH conditions, even at the extreme low pH of 7.0. The intragenerational negative consequences of OA during long‐term acclimation highlights potential carryover effects and ontogenetic shifts in stress vulnerability, especially prior to and during reproduction. Yet, the presence of a transgenerational effect implies that this slipper limpet, which has been widely introduced along the West Pacific coasts, has the potential to adapt to rapid acidification.

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“…Ecosystem degradation caused by rapid development of urban agglomerations has become a global problem with drastic impacts on human well-being and economic development [14,15]. This problem could become increasingly acute in the coming decades [16]. Therefore, clarification of the impact of urbanization on the ecosystem services (hereafter referred to as ESs) of urban agglomerations is of critical importance to achieve sustainable regional development.…”

Section: Introductionmentioning

confidence: 99%

Spatially Heterogeneity Response of Critical Ecosystem Service Capacity to Address Regional Development Risks to Rapid Urbanization: The Case of Beijing-Tianjin-Hebei Urban Agglomeration in China

Wang

Zha

et al. 2022

Sustainability

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Urban agglomerations have become the new spatial unit of global economic competition. The intense socioeconomic activities attributed to the development of urban agglomerations are bound to cause damage to the ecosystem services of these urban agglomerations. This study adopts the Beijing-Tianjin-Hebei urban agglomeration in China as the research object, analyzes the spatiotemporal evolution of its critical ecosystem service capacity to address regional ++-development risks from 2000–2018, and employs the Moran’s I and geographically weighted regression model to explore the spatial correlation and spatial heterogeneity in the responses of urbanization and ecosystem services. The study indicates that (1) from 2000–2018, the ecosystem services of the Beijing-Tianjin-Hebei urban agglomeration exhibit an increase and then a decline, reaching the highest index in 2015; (2) the ecosystem services reveal obvious spatial heterogeneity with the Yan and Taihang Mountains region as the boundary; (3) built-up area ratio, GDP density, and population density exhibit highly obvious negative correlation driving characteristics on ecosystem services; and (4) the construction land ratio exerts a notable impact on areas with a high ecosystem services, while the spatial response of the effect magnitude of the population and GDP densities is largely influenced by intensive, high-pollution and energy-consuming industries. This article also proposes strategies for the optimization of ecological resources and spatial control, which are dedicated to mitigating the negative impacts of rapid urbanization processes on ecosystem services.

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Human impacts and changes in the coastal waters of south China

Cited by 23 publications

References 47 publications

Resilience of the larval slipper limpet Crepidula onyx to direct and indirect-diet effects of ocean acidification

Resilience of the larval slipper limpet Crepidula onyx to direct and indirect-diet effects of ocean acidification

Parental whole life cycle exposure modulates progeny responses to ocean acidification in slipper limpets

Spatially Heterogeneity Response of Critical Ecosystem Service Capacity to Address Regional Development Risks to Rapid Urbanization: The Case of Beijing-Tianjin-Hebei Urban Agglomeration in China

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