Rhodora最新文献_第8页

NEBC Meeting News NEBC会议新闻

IF 0.2 4区生物学

Rhodora Pub Date : 2022-04-12 DOI: 10.3119/0035-4902-122.992.354

Karen Hirschberg

引用次数: 0

Updating the Vascular Flora of Windham County, Connecticut 康涅狄格州温德姆县维管植物区系的更新

IF 0.2 4区生物学

Rhodora Pub Date : 2022-04-12 DOI: 10.3119/21-01

L. Standley, B. Connolly

引用次数: 0

New Records of the Woody Introduced Species Aralia elata (Apiaceae) and Symplocos paniculata in Massachusetts 麻萨诸塞州木引种Aralia elata（Apiaceae）和Symplocs paniculata新记录

IF 0.2 4区生物学

Rhodora Pub Date : 2022-04-12 DOI: 10.3119/21-02

L. Standley

引用次数: 0

Tree Composition and Size Structure Based on Nativity and Deer Resistance at an Urban Forest in Southeast Pennsylvania 宾夕法尼亚州东南部一座城市森林的树木组成和大小结构——基于原生性和抗鹿性

IF 0.2 4区生物学

Rhodora Pub Date : 2022-04-12 DOI: 10.3119/20-11

Gregory D. Turner, Kelly Ryan, William A Ricci, Kendra McMillin, G. Hertel

{"title":"Tree Composition and Size Structure Based on Nativity and Deer Resistance at an Urban Forest in Southeast Pennsylvania","authors":"Gregory D. Turner, Kelly Ryan, William A Ricci, Kendra McMillin, G. Hertel","doi":"10.3119/20-11","DOIUrl":"https://doi.org/10.3119/20-11","url":null,"abstract":"ABSTRACT. Urban forests of northeastern North America are often seen as degraded ecosystems with little ecological diversity or value. This is especially true given that native tree species declines in these forests have resulted from low recruitment caused by abundant exotic species, mortality from pathogens and pests, and severe deer browse. This study assessed tree composition and size structure of species found at the Robert B. Gordon Natural Area for Environmental Studies, an urban 51 ha forest fragment located 36 km west of Philadelphia, Pennsylvania. The study quantified and compared tree species from 15 plots located in mid- to late-successional forest stands. Species were categorized as native or exotic and resistant or nonresistant to deer browse. We quantified tree densities per species and measured diameter at breast height of all individuals > 2.5 cm and used this information to quantify relative importance values and assign trees to size classes. Natives Liriodendron tulipifera and Fagus grandifolia, and exotic Acer platanoides, dominated composition (i.e., 45.3% of total relative importance), with L. tulipifera most dominant. Natives had significantly greater densities than exotics in all size classes that included both categories, except for a 10–20 cm class, regardless of whether F. grandifolia, a prolific root sprouter, was included or excluded from comparisons. When F. grandifolia was excluded, nonresistant species had significantly greater densities than resistant ones in classes ranging from the smallest to larger classes. The prominence of nonresistant species in the smallest classes was unexpected given intense deer browsing.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45496705","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

Hook-Lobed Dandelion, Taraxacum hamatum (T. Section Hamata: Asteraceae) in Vermont 佛蒙特州的钩叶蒲公英

IF 0.2 4区生物学

Rhodora Pub Date : 2022-04-12 DOI: 10.3119/20-31

Arthur V. Gilman

引用次数: 0

Plant Traits and Community Metrics across a Snowmelt Gradient at Alpine Snowbank Sites on Mt. Washington, New Hampshire 新罕布夏州华盛顿山高山雪堆站点融雪梯度上的植物性状和群落指标

IF 0.2 4区生物学

Rhodora Pub Date : 2022-04-12 DOI: 10.3119/20-14

Kevin Berend, K. Amatangelo, D. Weihrauch, C. Norment, M. Penberthy

{"title":"Plant Traits and Community Metrics across a Snowmelt Gradient at Alpine Snowbank Sites on Mt. Washington, New Hampshire","authors":"Kevin Berend, K. Amatangelo, D. Weihrauch, C. Norment, M. Penberthy","doi":"10.3119/20-14","DOIUrl":"https://doi.org/10.3119/20-14","url":null,"abstract":"ABSTRACT. In northeastern North America, alpine snowbank communities are rare plant assemblages that form in sheltered sites above treeline where late-lying snow provides insulation from late-season frosts and a longer-lasting source of water. We measured snowpack and studied community composition and plant traits at the species and community scales across the snowmelt gradient at snowbank sites on Mt. Washington, New Hampshire. We used nonmetric multidimensional scaling ordination and analysis of similarity to examine community composition across the snowmelt gradient and measured plant traits (height, leaf dry matter content, leaf area, and specific leaf area) of four focal species (Carex bigelowii, Chamaepericlymenum canadense, Clintonia borealis, and Maianthemum canadense). We assessed trait variability of the four focal species across the snowmelt gradient and evaluated community-weighted mean trait values and phenotypic plasticity between snowbank core and edge habitats. Analysis of similarity indicated that vascular plant diversity increased (p < 0.001), lichen and bryophyte cover decreased (p < 0.001; p < 0.025), and community-weighted mean leaf area increased (p < 0.001) in the core of snowbank communities where melting dates were later. Analysis of similarity indicated that vascular plant communities varied significantly across the snowmelt gradient. The transition in community composition and trait values across the snowmelt gradient are indicative of changing environmental conditions and ecosystem functions, though more research is needed to determine the extent to which phenotypic plasticity and ecotypic uniqueness influence trait expression of snowbank species. Genetic analysis may be necessary to evaluate population dynamics among isolated alpine communities, which may be vulnerable to climate change or displacement by exotic or lowland species.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42228095","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

Reviewers of Manuscripts 2019–2020 2019-2020年会稿审稿人

IF 0.2 4区生物学

Rhodora Pub Date : 2022-04-12 DOI: 10.3119/0035-4902-122.992.361

引用次数: 0

Inside Front Cover 封二

IF 0.2 4区生物学

Rhodora Pub Date : 2021-09-07 DOI: 10.1039/d1re90013g