Bulletin of the Torrey Botanical Club最新文献_第7页

Changes in land use and land cover: a global perspective 土地利用和土地覆盖的变化:全球视角

Bulletin of the Torrey Botanical Club Pub Date : 1995-07-01 DOI: 10.2307/2996094

W. Meyer, B. Turner

引用次数: 446

Classification of barrens and other natural xeric forest openings in Southern Illinois 伊利诺斯州南部的荒地和其他天然干旱林开口的分类

Bulletin of the Torrey Botanical Club Pub Date : 1995-07-01 DOI: 10.2307/2996085

A. Heikens, P. A. Robertson, P. A. Robertson

{"title":"Classification of barrens and other natural xeric forest openings in Southern Illinois","authors":"A. Heikens, P. A. Robertson, P. A. Robertson","doi":"10.2307/2996085","DOIUrl":"https://doi.org/10.2307/2996085","url":null,"abstract":"HEIKENS, A. L. AND P. A. ROBERTSON (Department of Plant Biology, Southern Illinois University, Carbondale, IL 62901-6509). Classification of barrens and other natural xeric forest openings in southern Illinois. Bull. Torrey Bot. Club 122:203-214. 1995-Twenty-two natural xeric forest openings in southern Illinois on a variety of substrates were sampled using a modified Daubenmire canopy coverage method in order to classify, describe and define these plant community types. Barrens, xeric forest, sandstone glade, loess hill prairie and limestone glade plant community types were identified from an agglomerative hierarchical clustering of sites using Percent Similarity as the resemblance function and an Unweighted Pair Group method of classification. Some vegetation types were strongly related to substrate (i.e., limestone glades, sandstone glades) while others reflect successional status (i.e., xeric forests and barrens). Discriminant Analysis identified soil pH, soil depth, soil texture, amount of exposed rock, slope angle, cation exchange capacity and soil nutrients as significant discriminators among the community types. Four of the twenty-two sites are barrens, an endangered plant community in the Midwest (Heikens and Robertson 1994). Barrens are characterized by open-grown trees, primarily Quercus stellata and Quercus marilandica, and a mixture of prairie and dry woodland herbaceous species, including Schizachyrium scoparium, Danthonia spicata, Helianthus spp. and Chasmanthium latifolium, with 1-5% exposed rock, and soil depth of 8-15 cm on sandstone, shale and chert substrates. In this region, barrens appear to be timetransgressive communities that are remnants of a once more widespread community type and, unless maintained by fire or other disturbance processes, will succeed to forest.","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":"122 1","pages":"203"},"PeriodicalIF":0.0,"publicationDate":"1995-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68402700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 40

Initiation of a new woodland type on the Texas Coastal Prairie by the Chinese tallow tree (Sapium sebiferum (L.) Roxb.). 中国牛脂树(Sapium sebiferum, L.)在德克萨斯州沿海草原上形成一种新的林地类型Roxb)。

Bulletin of the Torrey Botanical Club Pub Date : 1995-07-01 DOI: 10.2307/2996086

K. Bruce, G. Cameron, P. Harcombe

{"title":"Initiation of a new woodland type on the Texas Coastal Prairie by the Chinese tallow tree (Sapium sebiferum (L.) Roxb.).","authors":"K. Bruce, G. Cameron, P. Harcombe","doi":"10.2307/2996086","DOIUrl":"https://doi.org/10.2307/2996086","url":null,"abstract":"BRUCE, K. B., G. N. CAMERON (Department of Biology, University of Houston, Houston, Texas 77204) AND P. A. HARCOMBE (Department of Ecology and Evolutionary Biology, Rice University, Houston, Texas 77251). Initiation of a new woodland type on the Texas Coastal Prairie by the Chinese tallow tree (Sapium sebiferum (L.) Roxb.). Bull. Torrey Bot. Club 122:215-225. 1995.-The chronosequence method (stand ages 0-20 years) was used to study the invasion of the Upper Coastal Prairie of Texas by the Chinese tallow tree and to learn whether this exotic plant would be replaced by native woodland species. This invasion marked a dramatic transformation of community structure. Dominance of life forms shifted rapidly (< 10 years to canopy closure) as graminoids and forbs were replaced by trees and shrubs during succession. Size-frequency distributions of the trees showed that stands were not even-aged. Many stands in the oldest three age classes exhibited descending monotonic tree size distributions. Because Chinese tallow produces seeds soon after establishment, it seems likely that the rapid increase in density was the result of initial trees acting as seed sources. The most common native trees that appeared in the survey were generally small-seeded inhabitants of local riparian areas, e.g., hackberry (Celtis laevigata), elm (Ulmus americana), green ash (Fraxinus pensylvanica), and yaupon (Ilex vomitoria). Low densities of these species indicated slow invasion rates compared to that of tallow. Currently, stands are virtually monospecific. However, the non-tallow species showed a significant increase in density with stand age which suggests that these woodlands may become more diverse in the future.","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":"122 1","pages":"215-225"},"PeriodicalIF":0.0,"publicationDate":"1995-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996086","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68402739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 111

Branch Architecture Plasticity of Amur Honeysuckle (Lonicera maackii (Rupr.) Herder): Initial Response in Extreme Light Environments 黑龙江金银花(Lonicera maackii, rur .)枝结构的可塑性牧民):在极端光环境下的初始反应

Bulletin of the Torrey Botanical Club Pub Date : 1995-07-01 DOI: 10.2307/2996083

J. Luken, T. C. Tholemeier, B. Kunkel, L. M. Kuddes

引用次数: 32

Intermountain Flora, Volume Five: The Asterales. 《山间植物志》第五卷:星形植物。

Bulletin of the Torrey Botanical Club Pub Date : 1995-07-01 DOI: 10.2307/2996090

S. Clemants, A. Cronquist

引用次数: 1

Community-Level Allometric Relationships Among Length, Planar Area, and Biomass of Fine Roots on a Coastal Barrier Island 沿海堰洲岛细根长度、平面面积和生物量的异速生长关系

Bulletin of the Torrey Botanical Club Pub Date : 1995-07-01 DOI: 10.2307/2996084

Richard E. Snook, F. Day

{"title":"Community-Level Allometric Relationships Among Length, Planar Area, and Biomass of Fine Roots on a Coastal Barrier Island","authors":"Richard E. Snook, F. Day","doi":"10.2307/2996084","DOIUrl":"https://doi.org/10.2307/2996084","url":null,"abstract":"predict biomass and biomass change. The objective of this study was to determine if predictive communitylevel allometric relationships between root length, planar area and biomass existed in a coastal barrier island dune ecosystem. Fine root samples were extracted monthly from four dune and swale areas along a chronosequence (6, 24, 36, and 120 years old) on Hog Island, part of the Virginia Coast Reserve-Long Term Ecological Research site. Dominant life forms were rhizomatous perennial grasses on the dunes and in younger swales and shrubs in the older swales. Root planar area in May and August yielded the stronger regression relationships, with winter values exhibiting greater variability. An analysis of covariance (ANCOVA) was used to examine the heterogeneity of regression slopes among sample dates. Both root length and area models exhibited significantly greater slopes during the course of the growing season. The regression slopes for the oldest dune site displayed no significant differences with season for either length or area. Data from the swales produced stronger predictive relationships than the dunes. These results provide a foundation for indirect root biomass estimates in this system.","PeriodicalId":9453,"journal":{"name":"Bulletin of the Torrey Botanical Club","volume":"122 1","pages":"196"},"PeriodicalIF":0.0,"publicationDate":"1995-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/2996084","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68402689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A Floristic Plant Ecology Study of the Limestone Glades of Northern Alabama 阿拉巴马州北部石灰岩林地植物区系生态学研究

Bulletin of the Torrey Botanical Club Pub Date : 1995-07-01 DOI: 10.2307/2996087

J. Baskin, D. H. Webb, C. Baskin

引用次数: 39

Wood anatomy of Drosophyllum (Droseraceae): ecological and phylogenetic considerations 果蝇科的木材解剖:生态学和系统发育的考虑

Bulletin of the Torrey Botanical Club Pub Date : 1995-07-01 DOI: 10.2307/2996082

S. Carlquist, E. J. Wilson

引用次数: 13

Sampling devices for the measurement of seed rain and hydrochory in rivers1 测量河流种子雨和水文的取样装置

Bulletin of the Torrey Botanical Club Pub Date : 1995-04-01 DOI: 10.2307/2996454

B. Middleton

引用次数: 35

From Coastal Wilderness to Fruited Plain: A History of Environmental Change in Temperate North America from 1500 to the Present. 从沿海荒野到硕果累累的平原:1500年至今的北美温带环境变化史。

Bulletin of the Torrey Botanical Club Pub Date : 1995-04-01 DOI: 10.2307/2996456

D. Gibson, G. Whitney

引用次数: 391