Wetlands最新文献_第5页

Factors Influencing the Resilience of Created Tidal Marshes in the Fraser River Estuary, British Columbia 影响不列颠哥伦比亚省弗雷泽河口人造潮汐沼泽恢复能力的因素

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-05-01 DOI: 10.1007/s13157-024-01802-x

Daniel Stewart, Megan Lievesley, James E. Paterson, Daniel Hennigar, Robyn Ingham, Rob Knight, Brad Mason, Eric Balke

{"title":"Factors Influencing the Resilience of Created Tidal Marshes in the Fraser River Estuary, British Columbia","authors":"Daniel Stewart, Megan Lievesley, James E. Paterson, Daniel Hennigar, Robyn Ingham, Rob Knight, Brad Mason, Eric Balke","doi":"10.1007/s13157-024-01802-x","DOIUrl":"https://doi.org/10.1007/s13157-024-01802-x","url":null,"abstract":"More than 100 tidal marsh creation projects were constructed throughout the Fraser River Estuary, British Columbia, Canada from the 1980s to present. Past studies described and evaluated many of these projects and found varied success, but the underlying factors that determine project outcomes remain uncertain. Combining field sampling, spatial analysis, and statistical modeling of plant communities, we aim to address this knowledge gap by asking what factors influence the resilience of created marshes, as measured by (1) persistence of marsh vegetation, (2) native species dominance, and (3) species richness. We observed marsh recession in 40 of the 78 projects visited, representing 23,666 m2 (9.3%) of the 254,357 m2 of created marsh surveyed. Increases in mean site elevation had a negative effect on percent recessed area, while sites in the north branch of the river and sites further upriver were more prone to recession. From field observations and data interpretation we suggest that wake erosion and Canada Goose (Branta canadensis) herbivory may be drivers behind these losses and warrant further investigation. Dominance of native species declined with distance upriver, though invasive cattail (Typha angustifolia, T. × glauca) defied this trend, dominating outer estuary sites, particularly closed embayments, when present. Native and non-native richness shared similar patterns and were comparable between reference and created marshes, increasing on average with elevation and distance upriver. These findings offer insight into how site design and location influence the outcome of marsh creation projects, and the challenges presented by stressors and environmental change in estuaries.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140837944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Examination of Drone Usage in Estimating Hardwood Plantations Structural Metrics 研究使用无人机估算硬木种植园的结构指标

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-04-27 DOI: 10.1007/s13157-024-01807-6

Tyler Corbin, Mohammad Bataineh

{"title":"Examination of Drone Usage in Estimating Hardwood Plantations Structural Metrics","authors":"Tyler Corbin, Mohammad Bataineh","doi":"10.1007/s13157-024-01807-6","DOIUrl":"https://doi.org/10.1007/s13157-024-01807-6","url":null,"abstract":"Planting hardwood trees on retired marginal agricultural land is one of the main strategies used to restore forested wetlands. Evaluating effectiveness of wetland restoration requires efficient monitoring to evaluate recovery trajectories and desired conditions. Recent advancements in unmanned aerial system (UAS) technologies have prompted wide-scale adoption of UAS platforms in providing a range of ecological data. In this study, we examined the use of UAS Structure from Motion (SfM) derived point clouds in estimating tree density, canopy height, and percent canopy cover for bottomland hardwood plantations within four wetland reserve easements. Using a local maxima approach for individual tree detection produced plantation level estimates with mean absolute errors of 150 trees per hectare, 0.5 m, and 18.4% for tree density, canopy height, and percent canopy cover, respectively. At the plot level, UAS-derived tree counts (r = 0.53, p < 0.01) and canopy height (r = 0.57, p < 0.01) were significantly correlated with ground-based estimates. We demonstrate that UAS-SfM is a viable method of assessing bottomland hardwood plantations for applications that require precision levels congruent with the mean absolute errors reported here. The accuracy of tree density estimates was reliant upon specific local maxima window parameters relative to stand conditions. Therefore, acquisition of leaf-off and leaf-on imagery may allow for better individual tree detection and subsequently more accurate tree density and other structural attributes.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"30 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140809728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Dead Forest of Chiefs Island: Soil Water Logging from Major Floods and Rainfalls Drive Rapid Vegetation Change in the Okavango Delta (Botswana) 酋长岛的死亡森林：洪水和暴雨造成的土壤水分流失导致奥卡万戈三角洲（博茨瓦纳）植被迅速变化

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-04-20 DOI: 10.1007/s13157-024-01804-9

Marc Jolivet, Mike Murray-Hudson, Kaelo Makati, Olivier Dauteuil, Louis Gaudare

{"title":"The Dead Forest of Chiefs Island: Soil Water Logging from Major Floods and Rainfalls Drive Rapid Vegetation Change in the Okavango Delta (Botswana)","authors":"Marc Jolivet, Mike Murray-Hudson, Kaelo Makati, Olivier Dauteuil, Louis Gaudare","doi":"10.1007/s13157-024-01804-9","DOIUrl":"https://doi.org/10.1007/s13157-024-01804-9","url":null,"abstract":"The flood-controlled Okavango Delta in Botswana is an endoreic alluvial fan system developing within the arid to semi-arid Kalahari Desert. The Delta sustains a unique association of ecosystems, from rivers to floodplains, riverine forests to savanna forests. This complex environment is nearly pristine from anthropic activity but its preservation, especially in the face of global change, requires a detailed understanding of the functioning and evolution of its ecosystems. In this work we describe extensive tree dieback in the savanna forest of southern Chiefs Island, the largest permanently emerged island of the Delta. While tree dieback is generally linked to drought, extreme temperatures, fire or increased biotic attacks, we suggest that the destruction in the years 2009–2012 of the Acacia sp. and Colophospernum mopane dominated forest unexpectedly results from drowning through soil water logging associated to a series of successive exceptional floods and abundant rainfall seasons. This result highlights the necessity of transdisciplinary studies in understanding the autogenic functioning of the Delta as a prerequisite to describe the effects of global change.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"10 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

A Murky Ruling Threatens the Fate of Millions of US Wetlands 一项模糊的裁决威胁着美国数百万湿地的命运

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-04-17 DOI: 10.1007/s13157-024-01801-y

B. Alexander Simmons, Marcus W. Beck, Kerry Flaherty-Walia, Jessica Lewis, Edward T. Sherwood

{"title":"A Murky Ruling Threatens the Fate of Millions of US Wetlands","authors":"B. Alexander Simmons, Marcus W. Beck, Kerry Flaherty-Walia, Jessica Lewis, Edward T. Sherwood","doi":"10.1007/s13157-024-01801-y","DOIUrl":"https://doi.org/10.1007/s13157-024-01801-y","url":null,"abstract":"For decades, federal protections were extended to wetlands adjacent to “waters of the US” by the Clean Water Act. In its Sackett v. EPA ruling, however, the US Supreme Court redefined the meaning of “adjacent,” eliminating protections to wetlands without a continuous surface connection to these waters (i.e., geographically isolated wetlands, GIWs). Yet it remains unclear how this continuous surface test will work in reality, where ecological connectivity often extends beyond physical connectivity. Here, we calculate the number of US wetlands that could be considered geographically isolated depending upon the distance threshold used to define isolation (ranging from 1 m to 100 m from the nearest hydrological feature). Overall, we estimate that 27–45% of wetlands, at minimum, could be considered geographically isolated using this range of distance thresholds. Over 3 million wetlands are within 1–100 m of the nearest hydrological feature, making them most vulnerable to losing prior protections from the Clean Water Act. The Midwest and Northeast have the largest share of potential GIWs within this range. Freshwater emergent wetlands and forested/shrub wetlands make up the majority of these vulnerable wetlands, though this varies by state. Roughly 47% of these wetlands are located in states without state-level protections for GIWs. Our analysis highlights the heterogeneity of risk to wetlands across the country and the scale of the uncertainty imposed by the updated Sackett definition. State-level protections that are robust to changes in federal protections are urgently needed to secure the country’s wetlands from further pollution and destruction.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"2012 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140613424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Restored Wetland Size and Age Influence Small Mammal Communities in West Virginia, USA 恢复后的湿地面积和年龄对美国西弗吉尼亚州小型哺乳动物群落的影响

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-04-17 DOI: 10.1007/s13157-024-01799-3

Krista L. Noe, Christopher T. Rota, Mack W. Frantz, James T. Anderson

{"title":"Restored Wetland Size and Age Influence Small Mammal Communities in West Virginia, USA","authors":"Krista L. Noe, Christopher T. Rota, Mack W. Frantz, James T. Anderson","doi":"10.1007/s13157-024-01799-3","DOIUrl":"https://doi.org/10.1007/s13157-024-01799-3","url":null,"abstract":"Small mammals are important, albeit often overlooked, fauna in wetland restoration projects. However, it is essential to evaluate factors that influence small mammal community metrics in restored wetlands to maximize wetland restoration effectiveness. Previous studies found that vegetation differed as restored wetlands aged and that wetland age may play a role in the presence of amphibians and birds. Therefore, we assessed whether wetland age influenced small mammals. We also evaluated 17 environmental factors in restored wetlands that could influence small mammal communities in these wetlands. To assess and evaluate the effects of age and environmental factors on the small mammal community, we appraised 14 restored wetlands in West Virginia, USA, in the summers of 2020 and 2021 for small mammal community metrics, specifically relative abundance, diversity, richness, and evenness. We captured six species of small mammals: deer mice (Peromyscus maniculatus), white-footed mice (Peromyscus leucopus), meadow voles (Microtus pennsylvanicus), meadow jumping mice (Zapus hudsonius), northern short-tailed shrews (Blarina brevicauda), and eastern chipmunks (Tamias striatus). We found that the relative abundance of deer mice, white-footed mice, and meadow voles decreased with wetland age. However, both species diversity and evenness increased with wetland age. Wetland size influenced the relative abundance of white-footed mice, meadow jumping mice, and all small mammals combined. Although the relative abundance of white-footed mice and total small mammals decreased with wetland size, the relative abundance of meadow jumping mice increased with wetland size. Wetland managers should consider wetland age and size when designing wetlands to facilitate small mammal communities.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"250 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140613588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Choosing the Right Tool: A Comparative Study of Wetland Assessment Approaches 选择正确的工具：湿地评估方法比较研究

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-04-16 DOI: 10.1007/s13157-024-01798-4

William J. Kleindl, Sarah P. Church, Mark C. Rains, Rachel Ulrich

{"title":"Choosing the Right Tool: A Comparative Study of Wetland Assessment Approaches","authors":"William J. Kleindl, Sarah P. Church, Mark C. Rains, Rachel Ulrich","doi":"10.1007/s13157-024-01798-4","DOIUrl":"https://doi.org/10.1007/s13157-024-01798-4","url":null,"abstract":"There are over 700 aquatic ecological assessment approaches across the globe that meet specific institutional goals. However, in many cases, multiple assessment tools are designed to meet the same management need, resulting in a confusing array of overlapping options. Here, we look at six riverine wetland assessments currently in use in Montana, USA, and ask which tool (1) best captures the condition across a disturbance gradient and (2) has the most utility to meet the regulatory or management needs. We used descriptive statistics to compare wetland assessments (n = 18) across a disturbance gradient determined by a landscape development intensity. Factor analysis showed that many of the tools had internal metrics that did not correspond well with overall results, hindering the tool’s ability to act as designed. We surveyed regional wetland managers (n = 56) to determine the extent of their use of each of the six tools and how well they trusted the information the assessment tool provided. We found that the Montana Wetland Assessment Methodology best measured the range of disturbance and had the highest utility to meet Clean Water Act (CWA§ 404) needs. Montana Department of Environmental Quality was best for the CWA§ 303(d) & 305(b) needs. The US Natural Resources Conservation Service’s Riparian Assessment Tool was the third most used by managers but was the tool that had the least ability to distinguish across a disturbance, followed by the US Bureau of Land Management’s Proper Functioning Condition.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"52 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140588811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

When Drought Matters: Changes Within and Outside Protected Areas from the Pantanal Ecoregion 当干旱重要时：潘塔纳尔生态区保护区内外的变化

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-04-11 DOI: 10.1007/s13157-024-01800-z

Natália P. Smaniotto, Leonardo F. B. Moreira, Thiago B.F. Semedo, Fernando Carvalho, Fernando M. Quintela, André V. Nunes, Yulie Shimano

{"title":"When Drought Matters: Changes Within and Outside Protected Areas from the Pantanal Ecoregion","authors":"Natália P. Smaniotto, Leonardo F. B. Moreira, Thiago B.F. Semedo, Fernando Carvalho, Fernando M. Quintela, André V. Nunes, Yulie Shimano","doi":"10.1007/s13157-024-01800-z","DOIUrl":"https://doi.org/10.1007/s13157-024-01800-z","url":null,"abstract":"Protected areas (PA) are being stifled by human land uses, jeopardizing their integrity and ecosystem services. Therefore, we searched for human land use within 19 PAs of the Pantanal ecoregion. We assessed changes in land cover from protected areas’ creation year up to 2021. In addition, we established a 10 km buffer from each PA limit to compare trends in the landscape inside and outside PAs. Our results indicated the presence of pasture fields in eight PAs analyzed. We also detected a decrease in open water areas and a slight variation in native vegetation over the years. There was an increase in grassland and savanna areas, while forest, wetland, and pasture fields did not change over the years. Of all 19 buffer zones, 15 had human land uses. In addition to an increase in the human land use area, buffer zones showed an increase in grassland cover and a decrease in the open water cover. Terrestrial environments within most Pantanal PAs still stand to human interventions. Still, the human land use in reserves where it is not allowed indicates management issues and low law enforcement. Unfortunately, aquatic environments’ protection is more challenging, depending on actions at lowlands and surrounding plateaus that harbor the headwaters. There is a clear need to integrate warming and drying impacts in the protected areas management plans. Since we have no control over large-scale climate, we must focus more on mitigating regional climate from a land use perspective.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"28 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140588685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Differential Post-Fire Vegetation Recovery of Boreal Plains Bogs and Margins 北方平原沼泽和边缘地带火灾后植被恢复的差异

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-03-21 DOI: 10.1007/s13157-024-01794-8

Kristyn M. Mayner, Paul A. Moore, Sophie L. Wilkinson, Henry J. M. Gage, James Michael Waddington

{"title":"Differential Post-Fire Vegetation Recovery of Boreal Plains Bogs and Margins","authors":"Kristyn M. Mayner, Paul A. Moore, Sophie L. Wilkinson, Henry J. M. Gage, James Michael Waddington","doi":"10.1007/s13157-024-01794-8","DOIUrl":"https://doi.org/10.1007/s13157-024-01794-8","url":null,"abstract":"Peatland margins are a distinct ecotone especially vulnerable to deep smouldering in the Boreal Plains because they can experience greater water table drawdown during dry periods compared to peatland middles. Margin recovery trajectories have potentially important implications for wildfire behaviour as both the rate of vegetation recovery and community composition control fuel load and flammability. We compared peatland margin and middle vegetation trajectories using a chronosequence of time-since-fire in boreal Alberta, Canada. Margins had unique post-fire indicator species, with a higher broadleaf cover and limited Sphagnum moss colonization. Middles and margins became less distinct with greater time-since-fire, where both were dominated by feathermoss as canopy closure increased. High burn severity in margins can expose the seedbank in the underlying mineral soil to favourable conditions, causing rapid accumulation of broadleaf aboveground biomass and limiting Sphagnum establishment. The rapid accumulation of aboveground biomass increases potential fuel load, while exclusion of Sphagnum increases future smouldering potential given the dense peat in the margin ecotone. However, the dominance of deciduous vegetation for several decades post fire would serve to limit wildfire compared to a conifer-dominated system, particularly post leaf-out. Thus, peatland margins could represent a positive feedback to peat carbon loss for early season fires and a negative feedback for post leaf-out fires due to the interplay between fuel load, fire seasonality, and species flammability. Characterization of margins as distinct ecotones with a separate vegetation structure and species composition from peatland middles provides critical insight about wildfire vulnerability and carbon storage in the Boreal Plains.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"60 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140202974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Warming and Elevated CO2 on Stomatal Conductance and Chlorophyll Fluorescence of C3 and C4 Coastal Wetland Species 气候变暖和二氧化碳升高对 C3 和 C4 沿海湿地物种气孔导度和叶绿素荧光的影响

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-03-19 DOI: 10.1007/s13157-024-01780-0

Kerrie M. Sendall, Cyd M. Meléndez Muñoz, Angela D. Ritter, Roy L. Rich, Genevieve L. Noyce, J. Patrick Megonigal

{"title":"Effects of Warming and Elevated CO2 on Stomatal Conductance and Chlorophyll Fluorescence of C3 and C4 Coastal Wetland Species","authors":"Kerrie M. Sendall, Cyd M. Meléndez Muñoz, Angela D. Ritter, Roy L. Rich, Genevieve L. Noyce, J. Patrick Megonigal","doi":"10.1007/s13157-024-01780-0","DOIUrl":"https://doi.org/10.1007/s13157-024-01780-0","url":null,"abstract":"Coastal wetland communities provide valuable ecosystem services such as erosion prevention, soil accretion, and essential habitat for coastal wildlife, but are some of the most vulnerable to the threats of climate change. This work investigates the combined effects of two climate stressors, elevated temperature (ambient, + 1.7 °C, + 3.4 °C, and 5.1 °C) and elevated CO2 (eCO2), on leaf physiological traits of dominant salt marsh plant species. The research took place at the Salt Marsh Accretion Response to Temperature eXperiment (SMARTX) at the Smithsonian Environmental Research Center, which includes two plant communities: a C3 sedge community and a C4 grass community. Here we present data collected over five years on rates of stomatal conductance (gs), quantum efficiency of PSII photochemistry (Fv/Fm), and rates of electron transport (ETRmax). We found that both warming and eCO2 caused declines in all traits, but the warming effects were greater for the C3 sedge. This species showed a strong negative stomatal response to warming in 2017 and 2018 (28% and 17% reduction, respectively in + 5.1 °C). However, in later years the negative response to warming was dampened to < 7%, indicating that S. americanus was able to partially acclimate to the warming over time. In 2022, we found that sedges growing in the combined + 5.1 °C eCO2 plots exhibited more significant declines in gs, Fv/Fm, and ETRmax than in either treatment individually. These results are important for predicting future trends in growth of wetland species, which serve as a large carbon sink that may help mitigate the effects of climate change.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"20 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140172926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Depth trends of δ13C and δ15N values in peatlands in aeolian environments of Iceland 冰岛风化环境泥炭地中 δ13C 和 δ15N 值的深度变化趋势

IF 2 4区环境科学与生态学

Wetlands Pub Date : 2024-03-18 DOI: 10.1007/s13157-024-01796-6

Susanne Claudia Möckel, Egill Erlendsson, Guðrún Gísladóttir

{"title":"Depth trends of δ13C and δ15N values in peatlands in aeolian environments of Iceland","authors":"Susanne Claudia Möckel, Egill Erlendsson, Guðrún Gísladóttir","doi":"10.1007/s13157-024-01796-6","DOIUrl":"https://doi.org/10.1007/s13157-024-01796-6","url":null,"abstract":"Depth patterns of δ13C and δ15N values in peatlands are used to reconstruct their environmental history, e.g. their hydrology, temperature changes and degradation. However, the suitability of δ13C and δ15N as proxies for environmental reconstructions needs to be verified by studies in a diverse range of environments. We present a study on the influence of aeolian deposits on δ13C and δ15N values in peatlands in Iceland. Large areas in Iceland comprise highly active aeolian environments due to tephra from volcanic eruptions, and material from eroding drylands. The study is a first step toward assessing if depth profiles of δ13C and δ15N values can provide insight into the environmental history of peatlands in aeolian environments. We compare δ13C and δ15N values with several conventional proxies of decomposition (dry bulk density, C/N ratio and two ratios derived from 13C NMR spectra). We also interpret variations in δ13C and δ15N values in relation to the pedogenic minerals allophane and ferrihydrite and total mineral content. The complexity of depth trends of δ13C and δ15N values increases with proximity to source areas of windborne material. Particularly, there are turning points adjacent to major tephra layers. These patterns appear to be related to the influence of the volcanic deposits on factors like hydrology and fertility of the peatlands, microbial activity and vegetation composition. Depth trends of δ13C and δ15N values in peatlands of aeolian environments need to be interpreted in relation to other proxies reflecting the organic matter chemistry, and mineral soil constituents.","PeriodicalId":23640,"journal":{"name":"Wetlands","volume":"2014 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140170327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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