Estuaries and Coasts最新文献

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Global Diversity and Distribution of Rhizosphere and Root-Associated Fungi in Coastal Wetlands: A Systematic Review 沿海湿地根瘤菌和根相关真菌的全球多样性和分布:系统综述
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-22 DOI: 10.1007/s12237-024-01343-w
Candice Y. Lumibao, Georgia Harris, Christina Birnbaum
{"title":"Global Diversity and Distribution of Rhizosphere and Root-Associated Fungi in Coastal Wetlands: A Systematic Review","authors":"Candice Y. Lumibao, Georgia Harris, Christina Birnbaum","doi":"10.1007/s12237-024-01343-w","DOIUrl":"https://doi.org/10.1007/s12237-024-01343-w","url":null,"abstract":"<p>Coastal wetlands have been long recognized for their importance to biodiversity and many biogeochemical processes including carbon sequestration; however, our understanding of plant-microbe interactions that govern many processes in these ecosystems remains elusive. Fungal communities are known to play critical roles in coastal wetlands, particularly due to their close relationships with plants, yet, systematic understanding of their distributional patterns and the factors shaping these patterns in natural coastal wetland environments has been rarely assessed. We synthesized existing published literature from fifty-one studies spanning 60 years to examine global fungal distributional patterns in coastal wetlands, draw linkages between fungi, the plant communities, and their environment, and identify gaps in fungal research and suggest future research directions. We focused on studies that reported root-associated fungi and fungi from the plant rhizosphere (i.e., soil surrounding roots) in coastal dunes, intertidal flats, salt marshes, and tidal wetlands. Our synthesis has revealed that (1) 203 fungal species were reported from salt marshes, 59 fungal species from coastal dunes, 32 from tidal wetlands, and ten from intertidal flats; (2) rhizosphere fungal communities were more species-rich and reported more often for all ecosystems except in salt marshes; and (3) nineteen different fungal guilds, which are predominantly arbuscular mycorrhizal fungi. We conclude that more research is needed to better understand root-associated fungal diversity in less studied ecosystems reviewed here. We have identified knowledge gaps in reported data and outlined suggestions to facilitate future plant-fungal research in these declining, but important, coastal ecosystems.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140199694","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
Vulnerability to Sea-Level Rise Varies Among Estuaries and Habitat Types: Lessons Learned from a Network of Surface Elevation Tables in Puget Sound 不同河口和栖息地类型对海平面上升的脆弱性各不相同:从普吉特海湾地表高程表网络中汲取的经验教训
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-17 DOI: 10.1007/s12237-024-01335-w
Melanie J. Davis, Katrina L. Poppe, John M. Rybczyk, Eric E. Grossman, Isa Woo, Joshua W. Chamberlin, Michelle Totman, W. Todd Zackey, Frank Leonetti, Suzanne Shull, Susan E. W. De La Cruz
{"title":"Vulnerability to Sea-Level Rise Varies Among Estuaries and Habitat Types: Lessons Learned from a Network of Surface Elevation Tables in Puget Sound","authors":"Melanie J. Davis, Katrina L. Poppe, John M. Rybczyk, Eric E. Grossman, Isa Woo, Joshua W. Chamberlin, Michelle Totman, W. Todd Zackey, Frank Leonetti, Suzanne Shull, Susan E. W. De La Cruz","doi":"10.1007/s12237-024-01335-w","DOIUrl":"https://doi.org/10.1007/s12237-024-01335-w","url":null,"abstract":"<p>Estuarine systems that provide valuable ecosystem services to society and important foraging and rearing habitat for fish and wildlife species continue to undergo degradation. In Puget Sound, WA, as much as 70–80% of historic estuarine habitat has been lost to anthropogenic development, and continued losses are expected through the end of the twenty-first century due to rising sea levels. To evaluate whether Puget Sound’s estuarine habitats will keep pace with current and projected sea-level rise (SLR), we assessed vertical rates of elevation change from a regional network of surface elevation tables and marker horizons (SET-MH). Over the past two decades, SET-MH equipment has been installed throughout a variety of habitats in five Puget Sound estuaries: the Nisqually, Snohomish, Stillaguamish, and Skagit River estuaries, and Padilla Bay. These data provide a unique opportunity to assess elevation change and habitat resilience across a spatiotemporal and environmental gradient. We observed different rates of surface elevation change among estuaries and habitats (Nisqually = 4.64 ± 2.81 mm/year, Snohomish = 5.71 ± 5.83 mm/year, Stillaguamish = 12.82 ± 10.29 mm/year, Skagit = 16.13 ± 7.57 mm/year, Padilla = − 1.25 ± 1.58 mm/year). The highest rates were found at restoring sites with regular sediment input in the Stillaguamish and Skagit estuaries, whereas rates were consistently negative at low elevation sites in sediment starved Padilla Bay. Many sites in Puget Sound appear to be keeping pace with current rates of relative SLR, and some areas are on track to exceed projected rates through the end of the century. These findings indicate that Puget Sound’s estuarine habitats can be resilient to rising tidal levels—as long as sediment delivery is maintained.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140154859","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
Improving Satellite Chlorophyll-a Retrieval in the Turbid Waters of the Bay of Fundy, Canada 改进加拿大芬迪湾浑浊水域的卫星叶绿素 a 检索
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-15 DOI: 10.1007/s12237-024-01334-x
Kristen L. Wilson, Andrea Hilborn, Stephanie Clay, Emmanuel Devred
{"title":"Improving Satellite Chlorophyll-a Retrieval in the Turbid Waters of the Bay of Fundy, Canada","authors":"Kristen L. Wilson, Andrea Hilborn, Stephanie Clay, Emmanuel Devred","doi":"10.1007/s12237-024-01334-x","DOIUrl":"https://doi.org/10.1007/s12237-024-01334-x","url":null,"abstract":"<p>The Bay of Fundy is a highly productive ecosystem within the Northwest Atlantic where extreme tides and strong currents result in a large gradient of sediment concentrations across and along the bay. We processed daily satellite data from the MODerate resolution Imaging Spectroradiometer (MODIS) on the Aqua satellite from 2003 to 2021 at 300-m resolution to understand and quantify spatial and temporal trends in chlorophyll-a concentration (chl-a, a measure of phytoplankton biomass), and suspended particulate matter concentration (SPM) in the Bay of Fundy surface waters. To account for high sediment loading (up to 100’s g m<sup>−3</sup>) and moderate chl-a (median in situ chl-a of 1.5 mg m<sup>−3</sup> from 2003 to 2021), coefficients of the OC3M chl-a algorithm were regionally tuned using in situ chl-a data, and satellite-derived SPM was incorporated within the chl-a retrieval algorithm to account for possible bias. The updated new algorithm was denoted as OC<sub>X-SPMCor</sub>. Chl-a computed using OC<sub>X-SPMCor</sub> showed better performance against in situ chl-a than the generic OC3M with a coefficient of determination that increased from 0.01 to 0.28 and a root mean square logarithmic error that decreased by 35%. Unlike previous remote sensing studies, OC<sub>X-SPMCor</sub> correctly predicted the particular chl-a seasonality in the Bay of Fundy, which does not follow the typical occurrence of spring/fall blooms as observed in the adjacent Gulf of Maine and Scotian Shelf. For the first time, satellite-predicted chl-a aligned with the phenology of in situ chl-a, where chl-a continually increased from April to June and remained high all summer, with a small secondary summer peak before decreasing in the fall. SPM seasonality followed an opposite trend where SPM reached a maximum in winter and a minimum in summer. A small number of matchups and high temporal variability on the hourly time scale precluded a robust assessment of the satellite-derived SPM. However, comparisons between time series of remotely sensed and in situ SPM demonstrated the ability of the satellite-derived SPM to capture temporal variations, though the absolute values may be slightly underestimated. Accurate maps of phytoplankton biomass and sediment concentrations are essential variables required for effective management and conservation of marine ecosystems in the Bay of Fundy.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140155041","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
Salt Marsh Morphological Evolution Under Plant Species Invasion 植物物种入侵下的盐沼形态演变
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-14 DOI: 10.1007/s12237-024-01346-7
Xinchen Wang, Hong Zhang, Lucheng Zhan, Congcong Lao, Pei Xin
{"title":"Salt Marsh Morphological Evolution Under Plant Species Invasion","authors":"Xinchen Wang, Hong Zhang, Lucheng Zhan, Congcong Lao, Pei Xin","doi":"10.1007/s12237-024-01346-7","DOIUrl":"https://doi.org/10.1007/s12237-024-01346-7","url":null,"abstract":"<p>Species invasion in salt marsh wetlands is known to disturb the balance of biotic and abiotic ecosystems (e.g., changing material exchange cycles and community structure). However, its influence on the morphological evolution of salt marshes is not yet understood in depth. This study investigates the long-term temporal and spatial distributions of an invasive plant (<i>Spartina alterniflora</i>) and its morphological characteristics in the Yangtze Estuary by remote sensing imagery interpretation, tidal creek extraction, regional statistical analysis, and proximity analysis. The invaded site shows an area of <i>Spartina alterniflora</i> with a 35-fold increase from the start to the end of its initiation phase; it is the second biggest species in the study area. It is found that species invasion not only limited the expansion of native pioneer vegetation but also changed bio-geomorphic feedback loops. With the influence of plant invasion, median tidal creek lengths decreased and the median tidal creek sinuosity ratio remained stable, between 1.06 and 1.07 in the subarea. The method used here is adaptable to other salt marshes. The findings from this study can provide practical guidance for the restoration of native salt marshes in the estuary and thus control the spread of invasive species.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140129484","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
Abundance and Distribution of Blue Swimmer Crab in Response to Environmental Variation Across Two Contrasting Estuaries 蓝游蟹的丰度和分布对两个截然不同河口的环境变化的响应
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-13 DOI: 10.1007/s12237-024-01347-6
Roshan Hanamseth, Hayden T. Schilling, Daniel. D. Johnson, Iain M. Suthers, Matthew D. Taylor
{"title":"Abundance and Distribution of Blue Swimmer Crab in Response to Environmental Variation Across Two Contrasting Estuaries","authors":"Roshan Hanamseth, Hayden T. Schilling, Daniel. D. Johnson, Iain M. Suthers, Matthew D. Taylor","doi":"10.1007/s12237-024-01347-6","DOIUrl":"https://doi.org/10.1007/s12237-024-01347-6","url":null,"abstract":"<p>Portunid crabs are an iconic, high value species in NSW, but catches are highly variable in space and time. Substantial variation in biomass is observed in both exploited and unfished populations, and environmental effects on distribution and abundance are an important factor contributing to this variability. Predicting and responding to this variability is a challenge for management and sustainability of exploited populations. We examine spatial and temporal variation in Blue Swimmer Crab (<i>Portunus armatus</i>) populations, over a 2.5 year trapping survey in two temperate estuaries that differ in tidal flow and riverine input. Specifically, monthly catch rates and distribution throughout the estuary are examined alongside variation in temperature and conductivity. In Wallis Lake, the shallower estuary with a restricted entrance, both water temperature and conductivity impacted abundance and distribution of crabs but there was no evidence that pulses of freshwater flow had a major impact. For a 10 °C increase in temperature the population on average shifted ~ 700 m closer to the ocean. Males were consistently located slightly further into the estuary compared to females, but there was no convincing evidence of estuarine egression in response to lower salinity. In Port Stephens, the deeper, tidal estuary, water temperature and conductivity also impacted abundance, but while males were more dispersed than females, the distribution of crabs within the estuary did not appear to be influenced by temperature, conductivity or flow. These results highlight the links between nuanced environmental relationships and estuarine geomorphology for Blue Swimmer Crab.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140129483","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
Atoll Mangrove Progradation Patterns: Analysis from Jaluit in the Marshall Islands 环礁红树林演替模式:马绍尔群岛贾卢特的分析
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-11 DOI: 10.1007/s12237-024-01331-0
{"title":"Atoll Mangrove Progradation Patterns: Analysis from Jaluit in the Marshall Islands","authors":"","doi":"10.1007/s12237-024-01331-0","DOIUrl":"https://doi.org/10.1007/s12237-024-01331-0","url":null,"abstract":"<h3>Abstract</h3> <p>Low-lying islands are vulnerable to coastal erosion, and mangroves, which can mitigate erosion, have suffered enormous losses in recent decades owing to human impacts. Previous studies have little investigated mangrove shores on atolls, which may face combined multiple threats. We analysed the large Marshall Islands atoll of Jaluit, at a higher resolution than previous spatial change studies, finding that mangrove shorelines prograded seawards over the last seven decades. Biogeomorphic colonisation processes were characterised from transects along ~ 14.6 km of shorelines. Mangrove progradation occurred in patterns of arc-shapes evident of long-shore drift deposition, patch expansion of offshore mangrove colonisers, and linear shoreline advance. Significant differences in the rates of expansion were identified, with arc-shaped colonisation showing the fastest rates of expansion. However, linear shoreline advance was the most frequent expansion pattern showing greater than three-fold more classified transects than arc-shaped colonisation and patch expansion. These results have implications for low island mangrove restoration. Applying mangrove planting patterns mimicking these different natural colonisation processes may enhance restoration success in ecosystem-based adaptation projects to mitigate sea level rise vulnerability. Results from this study show that atoll mangrove shorelines demonstrate resilience during past sea level rise rates, and that rates of expansion vary according to patterns of biogeomorphic colonisation.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140100062","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
Potential Residence and Coexistence Strategy of Tursiops truncatus in a Coastal Lagoon in the Southern Gulf of Mexico: Ecological Inferences Using Stable Isotopes Tursiops truncatus 在墨西哥湾南部沿海泻湖的潜在居住地和共存策略:利用稳定同位素进行生态推断
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-11 DOI: 10.1007/s12237-024-01337-8
K. L. Naranjo-Ruiz, Y. E. Torres-Rojas, A. Delgado-Estrella
{"title":"Potential Residence and Coexistence Strategy of Tursiops truncatus in a Coastal Lagoon in the Southern Gulf of Mexico: Ecological Inferences Using Stable Isotopes","authors":"K. L. Naranjo-Ruiz, Y. E. Torres-Rojas, A. Delgado-Estrella","doi":"10.1007/s12237-024-01337-8","DOIUrl":"https://doi.org/10.1007/s12237-024-01337-8","url":null,"abstract":"<p>The Terminos Lagoon Flora and Fauna Protection Area is the largest coastal lagoon in the southern Gulf of Mexico and has the largest population of bottlenose dolphins, <i>Tursiops truncatus</i>, reported in the region. Photo identification studies have reported permanent and seasonal residence of dolphins; however, how dolphins coexist ecologically is unknown. In the present study, from 17 dead specimens stranded on the coast of Isla del Carmen (barrier island) between 2014 and 2016, stable isotopes in the liver, heart, and muscle, which represent different time scales, were analyzed to determine residence through δ<sup>13</sup>C values and niche width and trophic coexistence through δ<sup>15</sup>N values. Differences between sexes (δ<sup>13</sup>C liver: <i>p</i> = 0.009; heart: <i>p</i> = 0.01) and age classes (δ<sup>15</sup>N muscle: <i>p</i> = 0.02) were found, which indicated trophic sexual segregation and changes in resource use during growth, respectively. The lack of significant differences in δ<sup>13</sup>C values indicated isotopic equilibrium between the tissues, indicating the possible permanent residence of 12 dolphins in Terminos Lagoon as a coastal ecotype (− 16‰) and a second group (five dolphins) as an oceanic ecotype (− 18‰). In conclusion, most dolphins stranded in the Terminos Lagoon are potential permanent residents of this habitat, with evidence of resource partitioning as a coexistence strategy.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140129730","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
Assessing Southern Gulf of Mexico Resilience: Least Tern Nesting Failure During the COVID-19 Pandemic 评估墨西哥湾南部的恢复能力:COVID-19 大流行期间最小型燕鸥的筑巢失败
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-11 DOI: 10.1007/s12237-024-01341-y
Julio César Canales-Delgadillo, José Gilberto Cardoso-Mohedano, Nallely Vázquez-Pérez, Rosela Pérez-Ceballos, Arturo Zaldívar-Jiménez, Enrique Benítez-Orduña, Mario Alejandro Gómez-Ponce, Omar Celis-Hernández, Martín Merino-Ibarra, Carlos Robinson-Mendoza
{"title":"Assessing Southern Gulf of Mexico Resilience: Least Tern Nesting Failure During the COVID-19 Pandemic","authors":"Julio César Canales-Delgadillo, José Gilberto Cardoso-Mohedano, Nallely Vázquez-Pérez, Rosela Pérez-Ceballos, Arturo Zaldívar-Jiménez, Enrique Benítez-Orduña, Mario Alejandro Gómez-Ponce, Omar Celis-Hernández, Martín Merino-Ibarra, Carlos Robinson-Mendoza","doi":"10.1007/s12237-024-01341-y","DOIUrl":"https://doi.org/10.1007/s12237-024-01341-y","url":null,"abstract":"<p>The COVID-19 lockdown opened an opportunity to assess the response of animal populations to diminished human activities. As coastal dunes face many disturbances caused by increasing human activities, we assessed the effect of reduced human mobility on coastal bird diversity and abundance and on the Least Tern nest failure rate on an island in the southern Gulf of Mexico before, during, and after the lockdown to test the hypothesis that diminished tourism and recreational activities can contribute to the conservation of coastal ecosystems by increasing species richness and abundance and decreasing the nest failure rate. We used data from 2016 to 2021 to estimate nesting failure probabilities using Bernard’s cumulative distribution function, Kaplan‒Meier tests, and Cox regression for hazard rates. Bird species richness and abundance were compared using Kruskal‒Wallis rank tests. Factors related to breeding site preference were assessed using the BIOENV method. The lockdown did not affect species richness, but bird abundance was inversely related to pedestrian traffic (<i>rho</i> = − 0.908, <i>p</i> &lt; 0.0001, <i>n</i> = 48). Nest failure decreased during the lockdown in 2020 (<i>p</i> &lt; 0.0001) due to reduced presence of people, which allowed occupancy of sites never used before. During the lockdown, the proportion of nest failure was lower than that in the other sampling years (<i>p</i> &lt; 0.0001, φ range = − 0.445 to − 0.278). Accordingly, diminished pedestrian traffic can increase nest survival (log-rank <i>p</i> &lt; 0.0001). Policies to reduce beach pedestrian traffic will help strengthen wildlife conservation and building coastal resilience.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140099842","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
Influence of the Keystone Grazer, Sesarma reticulatum, on the Hydrology and Organic Matter Cycling in Salt Marshes of the Southeastern USA 美国东南部盐碱沼泽地水文和有机物质循环中的关键食草动物 Sesarma reticulatum 的影响
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-09 DOI: 10.1007/s12237-024-01336-9
Elise S. Morrison, Thomas S. Bianchi, William F. Kenney, Mark Brenner, Kimberly Prince, Sydney Williams, Collin Ortals, Orlando Cordero, Sinéad M. Crotty, Christine Angelini
{"title":"Influence of the Keystone Grazer, Sesarma reticulatum, on the Hydrology and Organic Matter Cycling in Salt Marshes of the Southeastern USA","authors":"Elise S. Morrison, Thomas S. Bianchi, William F. Kenney, Mark Brenner, Kimberly Prince, Sydney Williams, Collin Ortals, Orlando Cordero, Sinéad M. Crotty, Christine Angelini","doi":"10.1007/s12237-024-01336-9","DOIUrl":"https://doi.org/10.1007/s12237-024-01336-9","url":null,"abstract":"<p>In salt marshes of the Southeastern USA, purple marsh crabs (<i>Sesarma reticulatum</i>), hereafter <i>Sesarma</i>, aggregate in grazing and burrowing fronts at the heads of tidal creeks, accelerating creek incision into marsh platforms. We explored the effects of this keystone grazer and sediment engineer on salt marsh sediment accumulation, hydrology, and carbon (C) and nitrogen (N) turnover using radionuclides (<sup>210</sup>Pb and <sup>7</sup>Be), total hydrolyzable amino acids (THAA), and C and N stable isotopes (δ<sup>13</sup>C and δ<sup>15</sup>N) in sediment from paired <i>Sesarma</i>-grazed and un-grazed creeks. <i>Sesarma</i>-grazed-creek sediments exhibited greater bioturbation and tidal inundation compared to sediments in un-grazed creeks, as indicated by larger <sup>210</sup>Pb and <sup>7</sup>Be inventories. Total organic carbon (TOC) to total nitrogen (TN) weight ratios (C:N) were higher and δ<sup>15</sup>N values were lower in grazed-creek sediments than in un-grazed-creek sediments, suggesting <i>Sesarma</i> remove and assimilate N in their tissues, and excrete N with lower δ<sup>15</sup>N values into sediments. In support of this inference, the percent total carbon (TC) and percent TOC declined by nearly half, percent TN decreased by ~ 80%, and the C:N ratio exhibited a ~ threefold increase between <i>Sesarma</i> fore-gut and hind-gut contents. An estimated 91% of <i>Sesarma</i>’s diet was derived from <i>Spartina alterniflora,</i> the region’s dominant salt marsh plant. We found that, as <i>Sesarma</i> grazing fronts progress across marsh landscapes, they enhance the decay of <i>Spartina-</i>derived organic matter and prolong marsh tidal inundation. These findings highlight the need to better account for the effects of keystone grazers and sediment engineers, like <i>Sesarma</i>, in estimates of the stability and size of blue C stores in coastal wetlands.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140100021","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
Interactions Between Bacteria and Several Redox-Sensitive Metals (Fe, Mn, U) in the Sediments of the Yellow River Estuary Wetland, China 中国黄河口湿地沉积物中细菌与几种氧化还原敏感金属(铁、锰、铀)之间的相互作用
IF 2.7 3区 环境科学与生态学
Estuaries and Coasts Pub Date : 2024-03-08 DOI: 10.1007/s12237-024-01338-7
Jiahong Xi, Xihuang Zhong, Tong Zhang, Yu Zhen, Li Zou, Xueyan Jiang
{"title":"Interactions Between Bacteria and Several Redox-Sensitive Metals (Fe, Mn, U) in the Sediments of the Yellow River Estuary Wetland, China","authors":"Jiahong Xi, Xihuang Zhong, Tong Zhang, Yu Zhen, Li Zou, Xueyan Jiang","doi":"10.1007/s12237-024-01338-7","DOIUrl":"https://doi.org/10.1007/s12237-024-01338-7","url":null,"abstract":"<p>Estuarine wetlands are characterized by high biodiversity and active fluctuations in redox-sensitive metals (RSMs). In this study, sediment samples were collected from two sites, one with and one without vegetation, in the Yellow River Estuary Wetland (YREW). Active forms of Fe, Mn, and U were extracted using Tessier’s sequential extraction method, the bacterial community was analyzed through high-throughput sequencing, and the impact of the community on the RSMs was evaluated. The results indicated that the high nutrient content generated by vegetation withering had a positive effect on bacterial biodiversity, which led to high biomass and a wide variety of species in the sediments. Redox conditions and nutrient levels were the main factors influencing bacterial community structure. Under reducing conditions, genera such as <i>Desulfococcus</i> and <i>Desulfosarcina</i> were the main bacteria mediating the reduction of active Fe and Mn. Bacteria in genera such as <i>Desulfatiglans</i> and <i>Desulfotomaculum</i> were the main bacteria mediating the reduction of active U. These bacteria may result in obvious changes in the release of Fe, Mn, and U from salt marshes to nearshore regions. Our results can help to elucidate the interactions of bacteria and RSMs.</p>","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140075673","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}
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