Estuaries and Coasts最新文献

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Mangrove Cover and Extent of Protection Influence Lateral Erosion Control at Hybrid Mangrove Living Shorelines 红树林覆盖率和保护范围影响混合红树林生活海岸的侧向侵蚀控制
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-07-02 DOI: 10.1007/s12237-024-01391-2
Sophie C. Y. Chan, Stephen E. Swearer, Rebecca L. Morris
{"title":"Mangrove Cover and Extent of Protection Influence Lateral Erosion Control at Hybrid Mangrove Living Shorelines","authors":"Sophie C. Y. Chan, Stephen E. Swearer, Rebecca L. Morris","doi":"10.1007/s12237-024-01391-2","DOIUrl":"https://doi.org/10.1007/s12237-024-01391-2","url":null,"abstract":"<p>Erosion poses a significant threat to coastal and estuarine environments worldwide and is further exacerbated by anthropogenic activities and increasing coastal hazards. While conventional engineered structures, such as seawalls and revetments, are commonly employed to protect shorelines from wave impact and erosion, they can also cause detrimental environmental effects. By creating/restoring coastal habitats with engineered structures, hybrid living shorelines offer coastal protection and other co-benefits. Using aerial imagery, we studied the rates of shoreline change before and after living shoreline installation, and between living shorelines and adjacent bare shorelines in three estuaries in New South Wales, Australia. Mangroves had established behind most rock fillets and displayed a trend of increasing canopy cover with fillet age. In the first 3 years since installation, the rates of lateral shoreline change reduced from − 0.20, − 0.16, and − 0.10 m/year to − 0.03, − 0.01, and 0.06 m/year in living shorelines in Hunter, Manning, and Richmond Rivers, respectively. However, when compared to control shorelines, the effectiveness in reducing erosion varied among living shorelines with mean effect sizes of 0.04, − 0.28, and 1.74 across the three estuaries. A more positive rate of shoreline change was associated with an increasing percentage of mangrove canopy area and an increasing length of protected shoreline at wide channels. While hybrid mangrove living shorelines are a promising solution for mitigating erosion and creating habitats at an estuary-wide scale, they may also contribute to downdrift erosion, emphasising the importance of considering site-specific hydrogeomorphology and sediment movement when installing living shorelines.\u0000</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"187 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Foundation Species Shift Causes a Partial Loss of Functional Support for Benthic Coastal Consumers 地基物种转移导致底栖沿海消费者功能支持的部分丧失
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-07-02 DOI: 10.1007/s12237-024-01389-w
Janelle A. Goeke, Thomas W. Boutton, Anna R. Armitage
{"title":"Foundation Species Shift Causes a Partial Loss of Functional Support for Benthic Coastal Consumers","authors":"Janelle A. Goeke, Thomas W. Boutton, Anna R. Armitage","doi":"10.1007/s12237-024-01389-w","DOIUrl":"https://doi.org/10.1007/s12237-024-01389-w","url":null,"abstract":"<p>Foundation species support highly productive and valuable ecosystems, but anthropogenic disturbances and environmental changes are increasingly causing foundation species shifts, where one foundation species replaces another. The consequences of foundation shifts are not well understood, as there is limited research on the equivalency of different foundation species and the functions they support. Here, we provide insight into community-level consequences of foundation shifts in the Gulf of Mexico, where the typical marsh foundation species (<i>Spartina alterniflora</i>) is being replaced with a mangrove foundation species (<i>Avicennia germinans</i>), forcing marsh fauna to rely on <i>Avicennia</i> for foundational support. We evaluated the interactions of two common and ecologically valuable basal consumers, fiddler crabs (<i>Uca</i> spp.) and marsh periwinkle snails (<i>Littoraria irrorata</i>), with both foundation species across sites with different levels of mangrove encroachment. By investigating both physical support, measured as habitat association and co-occurrence, and trophic support, as basal resource diet contributions, we found that <i>Avicennia</i> can physically replace <i>Spartina</i> for some consumers, but is not providing equivalent trophic support. <i>Uca</i> and <i>Littoraria</i> commonly occupy encroached sites and associate with mangroves but incorporate almost no mangrove plant matter into their diets. The ultimate consequences of a foundation shift in the case of mangrove encroachment may include shifting energy flows and resource use and decreased populations of basal consumers. Looking at interactions with foundation species from multiple perspectives is necessary to obtain a complete picture of the effects that foundational shifts are having, especially as such shifts are becoming increasingly common.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"36 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141530605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Relative Importance of Macroalgae and Phytoplankton to Nearshore Consumers and Growth Across Climatic Conditions in the Northern Gulf of Alaska 阿拉斯加北部海湾大型藻类和浮游植物对近岸消费者的相对重要性以及不同气候条件下的生长情况
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-07-02 DOI: 10.1007/s12237-024-01371-6
Katherine Corliss, Vanessa von Biela, Heather Coletti, James Bodkin, Daniel Esler, Katrin Iken
{"title":"Relative Importance of Macroalgae and Phytoplankton to Nearshore Consumers and Growth Across Climatic Conditions in the Northern Gulf of Alaska","authors":"Katherine Corliss, Vanessa von Biela, Heather Coletti, James Bodkin, Daniel Esler, Katrin Iken","doi":"10.1007/s12237-024-01371-6","DOIUrl":"https://doi.org/10.1007/s12237-024-01371-6","url":null,"abstract":"<p>Macroalgae and phytoplankton support the base of highly productive nearshore ecosystems in cold-temperate regions. To better understand their relative importance to nearshore food webs, this study considered four regions in the northern Gulf of Alaska where three indicator consumers were collected, filter-feeding mussels (<i>Mytilus trossulus</i>), pelagic-feeding Black Rockfish (<i>Sebastes melanops</i>), and benthic-feeding Kelp Greenling (<i>Hexagrammos decagrammus</i>). The study objectives were to (1) estimate the proportional contributions of macroalgal and phytoplankton organic matter using carbon and nitrogen stable isotopes, (2) determine if macroalgal use affected consumer growth using annual growth rings in shells or otoliths, and (3) describe changes in organic matter use and growth during the Pacific Marine Heatwave (PMH; 2014–2016) in one consumer, mussels. Macroalgae were the major organic matter source (&gt; 60%) to the diet for all three consumers. The relationships between macroalgal contribution and growth were neutral for both fish species and significantly positive for mussels. During the PMH, mussels had a drop (&gt; 10%) in macroalgal contributions and grew 45% less than in other time periods. Simultaneously, the relationship between macroalgal contribution and mussel growth was strongest during the PMH, explaining 48% variation compared to 3–12% before or after the PMH. Collectively, the results suggest that macroalgae is likely more important to cold-temperate nearshore food webs than phytoplankton. Management actions aimed at conserving and expanding macroalgae are likely to benefit nearshore food webs under all climate scenarios and especially during marine heatwaves.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"10 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Utility of Ribbed Mussels Guekensia demissa for Marsh Grass Restoration on Living Shoreline Projects in the Southeast US: Potential and Pitfalls 美国东南部活海岸线项目中肋贻贝 Guekensia demissa 恢复沼泽草的实用性:潜力与陷阱
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-07-02 DOI: 10.1007/s12237-024-01394-z
John M. Carroll, William K. Annis, Risa A. Cohen
{"title":"The Utility of Ribbed Mussels Guekensia demissa for Marsh Grass Restoration on Living Shoreline Projects in the Southeast US: Potential and Pitfalls","authors":"John M. Carroll, William K. Annis, Risa A. Cohen","doi":"10.1007/s12237-024-01394-z","DOIUrl":"https://doi.org/10.1007/s12237-024-01394-z","url":null,"abstract":"<p>Living shorelines (LS) stabilize eroding banks while providing more natural habitats and creating a gentler slope for enhanced migration of flora and fauna migration as sea levels rise. Typical LS practices include using several different materials, including oyster shell bags, to stabilize shorelines and planting marsh grasses. However, incorporating other important species interactions among marsh organisms can improve LS function and stability. For example, ribbed mussels, <i>Guekensia demissa</i>, benefit marsh plants by adding nutrients and stabilizing sediments. Unfortunately, mussels are not typically included in management and restoration practices. In this study, the objective was to investigate whether ribbed mussels facilitate marsh grass growth at a LS site in the southeastern US. We conducted field surveys for mussel abundance and recruitment, and a manipulative <i>in situ</i> experiment at an established LS site in Georgia to explore the impacts of adding mussels. Although mussel treatment did not have a significant effect on <i>Spartina alterniflora</i> metrics (i.e., density, height, biomass), <i>Spartina</i> plots with high mussel density exhibited ~300% increase in biomass relative to the start of the experiment, while plots without mussels only increased by ~100%. Some of the variability within treatments can be explained by high and sustained mussel mortality throughout the experimental period, likely due to predation, that impacted the actual mussel densities in our plots. We found that <i>Spartina</i> height, density, and biomass exhibited significant positive relationships with mussel biomass. Thus, ribbed mussels may be useful in living shorelines restoration projects if they are planted in sufficient densities, in aggregations, and/or with protective devices.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"168 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physical and Biological Controls on Short-Term Variations in Dissolved Oxygen in Shallow Waters of a Large Temperate Estuary 大型温带河口浅水区溶解氧短期变化的物理和生物控制因素
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-07-01 DOI: 10.1007/s12237-024-01372-5
Jeremy M. Testa, Wei Liu, Walter R. Boynton, Denise Breitburg, Carl Friedrichs, Ming Li, David Parrish, T. Mark Trice, Damian C. Brady
{"title":"Physical and Biological Controls on Short-Term Variations in Dissolved Oxygen in Shallow Waters of a Large Temperate Estuary","authors":"Jeremy M. Testa, Wei Liu, Walter R. Boynton, Denise Breitburg, Carl Friedrichs, Ming Li, David Parrish, T. Mark Trice, Damian C. Brady","doi":"10.1007/s12237-024-01372-5","DOIUrl":"https://doi.org/10.1007/s12237-024-01372-5","url":null,"abstract":"<p>Hypoxia in coastal waters is a pressing ecological problem caused by continued eutrophication and climatic change that has widespread consequences for metazoan life and biogeochemical cycles. Numerous studies have investigated the controls on seasonal hypoxia formation and persistence in many of the world’s large estuaries and coastal hypoxic zones, but far fewer studies have examined the controls on short-term oxygen variability that leads to diel-cycling hypoxia in shallow-water environments. We utilized a unique, comprehensive (181 stations) record of dissolved oxygen concentrations collected at shallow water sites (primarily &lt; 2 m) at high frequency (15 min) throughout the estuarine complex of the Chesapeake Bay and its tributaries to quantify how internal and external variables co-varied with dissolved oxygen. We used a combination of time-series analysis, harmonic analysis, and machine learning (e.g., classification and regression trees (CART)) approaches to identify spatial patterns in major controls on oxygen variability and the duration of moderate hypoxia. We found that key controls on oxygen variability varied substantially over space. For example, photosynthetically active radiation (PAR) was a strong predictor of oxygen dynamics in the majority of mesohaline waters. In more fetch-exposed stations, wind strongly controlled hypoxic duration, but in eutrophic, inshore locations, chlorophyll <i>a</i>, or turbidity were often better predictors. Specifically, diel oxygen variability was muted in upstream regions characterized by high turbidity. The duration of low oxygen conditions, which we defined conservatively as less than 4.8 mg O<sub>2</sub> L<sup>−1</sup> (156 µM), was strongly controlled by temperature, and simple projections of regional warming and CART-derived oxygen thresholds suggest that the Bay could experience a 10% increase in this type of hypoxia duration by mid-to-late twenty-first century. The ratio of tidal to biological variability in oxygen was found to increase under conditions of higher turbidity, stronger wind, and lower salinity, but biological variability was typically a factor of two higher than tidal variability. Although chlorophyll-a generated high oxygen concentrations at some locations, those stations with exceptionally high chlorophyll a (&gt; 30 µg L<sup>−1</sup>) were the most vulnerable to hypoxia. Because conventional water quality modeling frameworks are designed to capture hypoxia on relatively long time scales, these new insights can help inform updated oxygen models to support the management of shallow-water estuaries in the face of managed nutrient reductions and climate change.\u0000</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"29 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Experimental Addition of Algae and Shell Hash on an Infaunal Mudflat Community 试验性添加藻类和贝壳灰对底栖泥滩群落的影响
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-06-28 DOI: 10.1007/s12237-024-01378-z
Samantha A. McGarrigle, Mia C. Francis, Heather L. Hunt
{"title":"Effects of Experimental Addition of Algae and Shell Hash on an Infaunal Mudflat Community","authors":"Samantha A. McGarrigle, Mia C. Francis, Heather L. Hunt","doi":"10.1007/s12237-024-01378-z","DOIUrl":"https://doi.org/10.1007/s12237-024-01378-z","url":null,"abstract":"<p>In coastal environments, eutrophication and ocean acidification both decrease pH, impacting the abiotic conditions experienced by marine life. Infaunal invertebrates are exposed to lower pH conditions than epifauna, as porewater pH is typically lower than the overlying water. We investigated the effects of altering sediment carbonate chemistry, through the addition of transplanted green algae and/or crushed shell hash, on an infaunal community. This factorial field experiment was conducted on an intertidal mudflat in the Bay of Fundy, New Brunswick, from July to September of 2020. After 1 month, sediment pH was increased across all depths (0.09 ± 0.03 pH units, or 0.84–2.5%) by the shell hash, but was not affected by the algae, while the multivariate community composition was impacted by an interaction between algae and experimental block (6.9% of variation) as well as shell hash treatment (2.7% of variation). After month 2, all responses to the treatments disappeared, likely due to tidal currents washing away some of the shell hash and algae, suggesting reapplication of the treatments is needed. Most of the variation in the community composition was explained by spatial variation in the treatment replicates among the treatment blocks (33.5% of variation). Despite the small effects of the experimental treatments on sediment carbonate chemistry, distance-based linear modeling indicated that sediment pH may be an important driver of variation in the infaunal community. Given the complexity of the processes driving sediment chemistry in coastal environments, further experiments exploring changing environmental conditions that drive infaunal marine community structure are required.\u0000</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"47 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluating Coastal Wetland Restoration Using Drones and High-Resolution Imagery 利用无人机和高分辨率图像评估沿海湿地恢复情况
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-06-24 DOI: 10.1007/s12237-024-01376-1
J. Mason Harris, Whitney P. Broussard, James A. Nelson
{"title":"Evaluating Coastal Wetland Restoration Using Drones and High-Resolution Imagery","authors":"J. Mason Harris, Whitney P. Broussard, James A. Nelson","doi":"10.1007/s12237-024-01376-1","DOIUrl":"https://doi.org/10.1007/s12237-024-01376-1","url":null,"abstract":"<p>Coastal marsh ecosystems are changing and being lost at a rapid rate around the world. One of the fastest rates of land loss, specifically coastal marsh habitat, occurs in Louisiana on the Northern Gulf Coast of the USA. To address this issue, state and federal agencies have undertaken massive wetland restoration efforts to preserve and restore coastal marsh habitats in Louisiana. For these efforts to be successful in the long-term, it is critical to understand what methodologies and techniques result in resilient restoration projects. However, traditional methods to monitor restoration success rely on labor intensive field measurements that are often limited in scope, difficult to maintain, and underfunded. Recent technological developments with uncrewed aircraft systems (UASs) and image processing have substantially improved the ability of restoration practitioners to use off-the-shelf UASs and cameras to map projects. We present a streamlined method using a commercially available drone with a high-resolution red, green, blue (RGB) camera to assess the effects of wetland restoration and integrate more modern tools into evaluation approaches. We conducted drone flights at restored brackish marshes of various ages using a space for time substitution with the goal of understanding the long-term success of marsh restoration. We observed that created marshes had higher land to water ratios than natural marshes. This finding suggests that these restored areas were gaining and maintaining elevation after approximately 10 years. Our method shows that drone surveys offer low-cost, minimally invasive methods for evaluating restored wetlands and ultimately tell us more about ecosystem function through realistic site-level habitat configurations.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"35 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimating Biogeochemical Rates Using a Computationally Efficient Lagrangian Approach 利用计算效率高的拉格朗日方法估算生物地球化学速率
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-06-24 DOI: 10.1007/s12237-024-01381-4
Edward Gross, Rusty Holleman, Wim Kimmerer, Tamara Kraus, Brian Bergamaschi, Scott Burdick-Yahya, David Senn
{"title":"Estimating Biogeochemical Rates Using a Computationally Efficient Lagrangian Approach","authors":"Edward Gross, Rusty Holleman, Wim Kimmerer, Tamara Kraus, Brian Bergamaschi, Scott Burdick-Yahya, David Senn","doi":"10.1007/s12237-024-01381-4","DOIUrl":"https://doi.org/10.1007/s12237-024-01381-4","url":null,"abstract":"<p>Nutrient concentrations in many estuaries have increased over the past century due to increases in wastewater discharge and increased agricultural intensity, contributing to multiple environmental problems. Numerous biogeochemical and physical processes in estuaries influence nutrient concentrations during transport, resulting in complex spatial and temporal variability and challenges identifying predominant processes and their rates. Mechanistic models which require these rates to quantify biogeochemical processes become complex and difficult to calibrate as the number of processes and parameters grows, owing to the high dimensionality of the parameter space and the computational cost of simultaneously modeling the transport and transformations of constituents. We developed a modeling approach that decouples transport from transformations, enabling fast, data-driven exploration of the parameter space. The approach extracted information including water age, cumulative exposure to specific habitats, and mean water depth exposure from a hydrodynamic model. Using this information, a biogeochemical model was implemented to predict ammonium and nitrate concentrations in a Lagrangian frame. The model performed each simulation in milliseconds on a laptop computer, allowing the fitting of rate parameters for key transformations by optimization. The optimization used fixed station nitrate observations and the model was then validated against high-resolution mapping observations of ammonium and nitrate. The results suggest that the observed spatial and temporal variation can be largely represented with five transformation processes and their associated rates. Dissolved inorganic nitrogen (DIN) losses occurred only in shallow vegetated areas in the model, highlighting that biogeochemical processes in these areas should be included in DIN models.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"49 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
What has Changed in 20 Years? Structure and Function of Soft-sediment Macrofauna in a Subarctic Embayment, Newfoundland (Canada) 20 年间发生了什么变化?纽芬兰(加拿大)亚北极河口软沉积大型底栖动物的结构与功能
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-06-21 DOI: 10.1007/s12237-024-01377-0
Ivana Komendić, Bárbara de Moura Neves, Patricia A. Ramey-Balci
{"title":"What has Changed in 20 Years? Structure and Function of Soft-sediment Macrofauna in a Subarctic Embayment, Newfoundland (Canada)","authors":"Ivana Komendić, Bárbara de Moura Neves, Patricia A. Ramey-Balci","doi":"10.1007/s12237-024-01377-0","DOIUrl":"https://doi.org/10.1007/s12237-024-01377-0","url":null,"abstract":"<p>Understanding how natural and anthropogenic disturbances affect the structure and functioning of marine ecosystems is central to predicting future dynamics. Placentia Bay is an Ecologically and Biologically Significant Area (EBSA) in the North Atlantic exposed to multiple stressors (e.g., rising sea surface temperatures, tanker traffic, and aquaculture). To investigate changes in the community and functional structure of soft-sediment macrofauna as well as environmental drivers of observed variation, we compared contemporary (2019–2020) and historical (1998) samples at eight stations (<i>n</i> = 77) collected 21 years apart. Although community and functional structure differed between these time points, functional traits were maintained (i.e., no loss of 36 trait modalities). Overall, 37% of species/taxa were only observed in either the historical or contemporary community, and the contemporary community exhibited lower macrofaunal density but had similar richness, resulting in higher evenness and diversity. Highly tolerant subsurface deposit feeders having small body sizes (&lt; 10 mm) and direct development dominated the historical community. The contemporary community had nearly equal proportions of surface and subsurface deposit feeders with small to medium body sizes (&lt; 10–50 mm) with pelagic larvae, and the proportion of highly tolerant species/taxa was reduced. These changes likely reflect the reduction in polychaetes (91 vs. 58%) and increased bivalves (4 vs. 25%) relative to the historical time point. Community variation was driven by changes in the sedimentary habitat. Contemporary versus historical sediments were ~ 4.5x coarser (possibly due to storms) with higher levels of sedimentary organic matter. This work contributes to advancing the understanding of relationships between benthic macrofauna, functional traits, and the sedimentary habitat in coastal environments.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"29 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Demographics of a Previously Undocumented Diamondback Terrapin (Malaclemys terrapin) Population 以前未记录的菱背陆龟(Malaclemys terrapin)种群的人口统计数据
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-06-18 DOI: 10.1007/s12237-024-01380-5
Daniel J. Catizone, Travis M. Thomas, Christina M. Romagosa, Margaret M. Lamont
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