Castanea最新文献_第4页

Effects of Grassy Bald Management on Plant Community Composition within The Roan Mountain Massif 罗安山地草地植被管理对植物群落组成的影响

IF 0.4 4区生物学

Castanea Pub Date : 2022-06-15 DOI: 10.2179/0008-7475.87.1.105

Cecelia Stokes, J. Horton

{"title":"Effects of Grassy Bald Management on Plant Community Composition within The Roan Mountain Massif","authors":"Cecelia Stokes, J. Horton","doi":"10.2179/0008-7475.87.1.105","DOIUrl":"https://doi.org/10.2179/0008-7475.87.1.105","url":null,"abstract":"ABSTRACT Within the Roan Mountain massif in the southern Appalachian Mountains, grassy balds are important, yet threatened ecosystems dominated by native graminoids with many endemic and endangered species. Restoration efforts have been conducted for 30 years by several agencies. In 1987–1988 a vegetation analysis was conducted on these balds to characterize plant communities before intensive management began. In summer 2020, we resurveyed the vegetation using similar methodologies on Round, Jane, and part of Grassy Ridge Balds to assess the impact of management activities. Percent coverage of vegetation type was recorded in 226 one m2 plots along 11 transects. Management history was compiled for individual plots. Percent cover data were subjected to cluster analysis, principal components analysis (PCA), non-metric multidimensional scaling (NMS), and regression. Cluster analysis of sampled plots revealed 12 plant community groups. PCA revealed plots separating along a gradient of blackberry and grass cover, as well as blackberry, grass, and fern cover. Results from NMS showed less separation of plots compared to PCA with most plots clustering in the center, except those with high bare ground coverage. A significant positive relationship was seen between graminoid cover and management frequency and a negative relationship with the amount of time since management activity. All of the relationships had low explanatory power suggesting that other factors might influence the plant populations. Our research shows there is a positive association with graminoid cover and increased management frequency, but more research involving other biotic and abiotic factors and management history should be explored.","PeriodicalId":50984,"journal":{"name":"Castanea","volume":"87 1","pages":"105 - 120"},"PeriodicalIF":0.4,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47545304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Noteworthy Collections: First documented antheridia on Palamocladium leskeoides (Brachytheciaceae) in North America 值得注意的收藏:在北美首次记录到的关于短叶蝉科(Palamocladium leskeoides)的孢子虫

IF 0.4 4区生物学

Castanea Pub Date : 2022-06-15 DOI: 10.2179/0008-7475.87.1.75

M. Oliver, Todd Crabtree, K. McFarland, Jessica M. Budke

引用次数: 1

Catillaria fungoides (Catillariaceae; Lecanoromycetes) an Inconspicuous Crustose Lichen Previously Overlooked in Eastern North America 金针菇(金针菇科;从前在北美东部被忽视的一种不显眼的甲壳苔藓

IF 0.4 4区生物学

Castanea Pub Date : 2022-06-15 DOI: 10.2179/0008-7475.87.1.12

Tomas Curtis, J. Lendemer

引用次数: 2

Community Science Success for Herbarium Transcription in Arkansas: Building a Network of Students and Volunteers for Notes from Nature 阿肯色州植物标本馆转录的社区科学成功:建立一个学生和志愿者的自然笔记网络

IF 0.4 4区生物学

Castanea Pub Date : 2022-06-15 DOI: 10.2179/0008-7475.87.1.54

Diana L. Soteropoulos, T. D. Marsico

{"title":"Community Science Success for Herbarium Transcription in Arkansas: Building a Network of Students and Volunteers for Notes from Nature","authors":"Diana L. Soteropoulos, T. D. Marsico","doi":"10.2179/0008-7475.87.1.54","DOIUrl":"https://doi.org/10.2179/0008-7475.87.1.54","url":null,"abstract":"ABSTRACT An estimated 390 million herbarium specimens worldwide provide data for scientific study, but specimen labels must be transcribed into standardized databases to be readily useable by the scientific community. Yet, data entry cannot be completed with current staffing and funding. Notes from Nature provides an infrastructure for community science transcription of natural history specimen labels with tutorials and a platform for communication among community scientists and researchers. The Plants of Arkansas project, now led by the Arkansas Natural Heritage Commission, built an active transcription community by coordinating local universities, recruiting service organizations, and engaging worldwide users online. Training members of service organizations creates continuing users dedicated to the project, and students learn about natural history collections and community science through real-world assignments. Our goals are to: 1) enumerate participants and transcription of the first 3.5 years of the project, 2) describe in-person events for recruitment, training, and connection with local collections, and 3) propose recommendations based on the evidence that increased engagement results in increased rates of contribution. The distribution of transcriptions per user compares to other community science projects, with a few individuals who transcribe thousands of labels. However, we have had more users that contribute >50 transcriptions in the Plants of Arkansas project. With our project's success, we offer suggestions to manage a transcription community and advance the rate of specimen digitization worldwide.","PeriodicalId":50984,"journal":{"name":"Castanea","volume":"87 1","pages":"54 - 74"},"PeriodicalIF":0.4,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43043316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ecological Correlates of Reproductive Output in a Tennessee Population of Short's Bladderpod, Physaria globosa (Brassicaceae) 田纳西州Short's Bladderpod、Physaria globosa（Brassicaceae）种群繁殖产量的生态相关性

IF 0.4 4区生物学

Castanea Pub Date : 2022-06-15 DOI: 10.2179/0008-7475.87.1.20

Shawn E. Krosnick, James H. Thacker, Hayden T. Mattingly, Geoff P. Call, Silas C. Maynord, Daniel S. Adams, Kit Wheeler

{"title":"Ecological Correlates of Reproductive Output in a Tennessee Population of Short's Bladderpod, Physaria globosa (Brassicaceae)","authors":"Shawn E. Krosnick, James H. Thacker, Hayden T. Mattingly, Geoff P. Call, Silas C. Maynord, Daniel S. Adams, Kit Wheeler","doi":"10.2179/0008-7475.87.1.20","DOIUrl":"https://doi.org/10.2179/0008-7475.87.1.20","url":null,"abstract":"ABSTRACT Physaria globosa (Brassicaceae), commonly known as Short's Bladderpod, is a federally protected species restricted to Tennessee, Kentucky, and southern Indiana. In 2016, we studied aspects of life history and ecology in a population of P. globosa near Hartsville, Tennessee. Our objectives were to document fecundity-related life history traits and to examine the potential influence of light levels and soil depth on plant growth and reproductive output. In addition, we examined 45 herbarium specimens of P. globosa to assess the potential relationship between taproot size and number of inflorescences per plant. We found the strongest positive relationships between the number of flowering stems per plant and the number of flowers and fruits per plant. Relationships between light levels, soil depth, and biotic factors were only weakly significant. Taproot width was positively correlated with the number of flowering stems on herbarium specimens. Our findings increase the life history and ecology knowledge base available to guide ongoing recovery efforts for the species.","PeriodicalId":50984,"journal":{"name":"Castanea","volume":"87 1","pages":"20 - 38"},"PeriodicalIF":0.4,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47789804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Modeling Habitat Suitability for Stewartia ovata Across the Southeastern United States 美国东南部野樱草生境适宜性模拟

IF 0.4 4区生物学

Castanea Pub Date : 2022-01-07 DOI: 10.2179/0008-7475.86.2.173

Clayton W Hale, Joshua J. Granger, A. Paulson, Carlos Ramirez‐Reyes, Q. Ma, Jia Yang

{"title":"Modeling Habitat Suitability for Stewartia ovata Across the Southeastern United States","authors":"Clayton W Hale, Joshua J. Granger, A. Paulson, Carlos Ramirez‐Reyes, Q. Ma, Jia Yang","doi":"10.2179/0008-7475.86.2.173","DOIUrl":"https://doi.org/10.2179/0008-7475.86.2.173","url":null,"abstract":"ABSTRACT Mountain stewartia (Stewartia ovata) is a rare shrub or small tree endemic to the higher elevation regions of Georgia, Tennessee, and Alabama with isolated populations occurring in Kentucky, North Carolina, South Carolina, Virginia, and Mississippi. The species is often misidentified or overlooked by land managers and conservationists. As a result, mountain stewartia's habitat and distribution descriptions are limited for restoration and conservation use. Modeling a species' habitat suitability has become a critical first step in conserving rare and imperiled plant species. These models allow conservationists to locate previously undocumented populations and prioritize populations and habitats for conservation. This study presents a habitat suitability model for mountain stewartia across its known natural range based on maximum entropy (Maxent) modeling with nine environmental predictor variables and 60 occurrences from herbarium records (n=22), research-grade iNaturalist observations (n=25), and other author identified locations (n=3). The resulting habitat suitability map was classified into bins for spatial analysis. A total of 376,030 ha (0.44% of the study area) was designated within the top tier bin with the highest suitable habitat. Further, 133,344 ha (0.16% of the study area) of the top bin was found on publicly owned lands, indicating approximately 35.56% of the highest habitat suitability occurs within public lands. The presented model could allow plant conservationists to prioritize areas for conservation, reintroduction, and may lead to the discovery of previously undocumented populations.","PeriodicalId":50984,"journal":{"name":"Castanea","volume":"86 1","pages":"173 - 184"},"PeriodicalIF":0.4,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44544710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Scientific Note: Loblolly Pine Traumatic Resin Ducts Serve as Indicators of Cool-Season Weather Events at Nags Head, North Carolina 科学说明:火炬松创伤树脂管是北卡罗莱纳州纳格斯黑德寒冷季节天气事件的指示器

IF 0.4 4区生物学

Castanea Pub Date : 2022-01-07 DOI: 10.2179/0008-7475.86.2.296

Avery A. Catherwood, P. Knapp, T. Mitchell

{"title":"Scientific Note: Loblolly Pine Traumatic Resin Ducts Serve as Indicators of Cool-Season Weather Events at Nags Head, North Carolina","authors":"Avery A. Catherwood, P. Knapp, T. Mitchell","doi":"10.2179/0008-7475.86.2.296","DOIUrl":"https://doi.org/10.2179/0008-7475.86.2.296","url":null,"abstract":"ABSTRACT We present a method for recording cool-season (mid-October–May) weather events near Nags Head, North Carolina. Standardized traumatic resin duct frequency (TRDsf) formations in loblolly pine (Pinus taeda L.) were determined from earlywood radial growth samples using the number of traumatic resin ducts that occur in response to stressful weather events. Based on a sample of 39 cores collected at Nags Head Woods Ecological Preserve during summer 2020, we tested if the occurrence of traumatic resin ducts in the earlywood was caused by late-season tropical cyclones, mid-latitude windstorms, and snow/ice storms and served as a proxy for extreme weather frequency during 1950–2019. TRDsf was significantly related to years that had at least one documented cool-season weather event. The average TRDsf in a non-storm year was 1.95 while the average for a storm year was 2.99. Further, TRDsf was correlated with the number of cool-season weather events and there was no tree age-related bias to storm-event detection. These results support using TRD frequency to reconstruct cool-season storm history beyond current climate records at locations where older (150+ years) stands of loblolly pine forests exist along coastal North Carolina.","PeriodicalId":50984,"journal":{"name":"Castanea","volume":"86 1","pages":"296 - 304"},"PeriodicalIF":0.4,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42225193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Reevaluating Genetic Diversity and Structure of Helianthus verticillatus (Asteraceae) after the Discovery of New Populations 新居群发现后对菊科菊苣遗传多样性和结构的再评价

IF 0.4 4区生物学

Castanea Pub Date : 2022-01-07 DOI: 10.2179/0008-7475.86.2.196

E. Moore, C. Siniscalchi, J. Mandel

{"title":"Reevaluating Genetic Diversity and Structure of Helianthus verticillatus (Asteraceae) after the Discovery of New Populations","authors":"E. Moore, C. Siniscalchi, J. Mandel","doi":"10.2179/0008-7475.86.2.196","DOIUrl":"https://doi.org/10.2179/0008-7475.86.2.196","url":null,"abstract":"ABSTRACT Determining population genetic structure of isolated or fragmented species is of critical importance when planning a conservation strategy. Knowledge of the genetic composition and differentiation among populations of a rare or threatened species can aid conservation managers in understanding how, and which, populations to protect. The whorled sunflower, Helianthus verticillatus (Asteraceae), is a federally endangered sunflower species endemic to the southeastern United States. The distribution of the species comprises four known populations within three states: Alabama, Tennessee, and Georgia. Recently, new populations were discovered in Marshall County, Mississippi, and Franklin County, Virginia. Here, we carry out a population genetic study of these new populations using nuclear microsatellite markers and compare our results to those from previously known populations of H. verticillatus. Our results show that both newly discovered populations contain novel genetic variation, with Mississippi containing the most private alleles out of all populations tested. The Virginia population is genetically similar to the previously known populations but is under the most conservation concern given the recovery of only two unique genetic individuals found in this population. These results indicate these new populations are worthy of protection and conservation efforts given the unique genetic variation they harbor.","PeriodicalId":50984,"journal":{"name":"Castanea","volume":"86 1","pages":"196 - 213"},"PeriodicalIF":0.4,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47942153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Inventory of a Private Property Illustrates Diverse Cryptogam Floras in North Central Texas 一份私人财产清单展示了德克萨斯州中北部多种隐花植物

IF 0.4 4区生物学

Castanea Pub Date : 2022-01-07 DOI: 10.2179/0008-7475.86.2.246

T. S. Quedensley, Dale A. Kruse, Caleb A. Morse

引用次数: 0

New Populations of the Rheophytic Macrophyte Podostemum ceratophyllum Michx. (Hornleaf Riverweed) in West Virginia 标题变生性大型植物角藻的新居群。西弗吉尼亚州的(角叶河草)

IF 0.4 4区生物学

Castanea Pub Date : 2022-01-07 DOI: 10.2179/0008-7475.86.2.214

S. Canfield, J. Wood

{"title":"New Populations of the Rheophytic Macrophyte Podostemum ceratophyllum Michx. (Hornleaf Riverweed) in West Virginia","authors":"S. Canfield, J. Wood","doi":"10.2179/0008-7475.86.2.214","DOIUrl":"https://doi.org/10.2179/0008-7475.86.2.214","url":null,"abstract":"ABSTRACT Podostemum ceratophyllum (Hornleaf riverweed) is a macrophyte that inhabits swift-water rivers with stable substrates and abundant light in montane and piedmont ecoregions of eastern North America. Within these habitats, P. ceratophyllum is considered a foundation species because the plant can strongly influence community structure by increasing habitat complexity for macroinvertebrates and fishes, and facilitates resources cycling via elemental sequestration, herbivory, and detrital pathways. Currently, the USDA and NatureServe recognize P. ceratophyllum as a conservation concern in some states, but the plant's status remains uncertain in many other states. In West Virginia, P. ceratophyllum is considered imperiled (S2) by the West Virginia Natural Heritage Program. The most recent records were collected in 1998, while other populations have not been confirmed since the late 1800s. To expand our current understanding of the distribution of P. ceratophyllum in West Virginia, we surveyed six historical sites and 34 new sites between 2015–2019. Four historical sites were found to still support P. ceratophyllum, and 10 new populations were discovered in six different river systems; however, P. ceratophyllum was not found at 26 other sites surveyed. Identifying new populations of P. ceratophyllum and resurveying previously documented populations in West Virginia expands the ecological and botanical understanding of this notably underreported plant. Improved documentation of P. ceratophyllum in West Virginia may benefit river management and restoration efforts in the state and provide insight into the plant's sensitivity to anthropogenic disturbances.","PeriodicalId":50984,"journal":{"name":"Castanea","volume":"86 1","pages":"214 - 224"},"PeriodicalIF":0.4,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47220165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1