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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
Pub Date : 1995-07-01 DOI: 10.2307/2996094
W. Meyer, B. Turner
Part I. Introduction: 1. Global land-use and land-cover change: an overview Part II. Working Group Reports: 2. A wiring diagram for the study of land use/cover change: Report of Working Group A 3. Towards a typology and regionalization of land-cover and land-use change: Report of Working Group B 4. Land-use and land-cover projections: Report of Working Group C Part III. Changes in Land Use and Land Cover: 5. Forests and tree cover 6. Grasslands 7. Human settlements Part IV. Environmental Consequences: 8. Atmospheric chemistry and air quality 9. Soils 10. Hydrology and water quality Part V. Human Driving Forces: 11. Population and income 12. Technology 13. Political-economic institutions 14. Culture and cultural change Part VI. Issues In Data and Modeling: 15. Modeling land-atmosphere interactions: a short review 16. Modeling global change in an integrated framework: a view from the social sciences 17. Data on global land-cover change: acquisition, assessment, and analysis Appendices Index.
第一部分引言:全球土地利用和土地覆盖变化:概述第二部分。工作组报告:2。土地用途/覆被变化研究接线图:第三工作小组报告迈向土地覆盖和土地利用变化的类型学和区域化:B工作组的报告土地使用和土地覆盖预测:C工作组的报告第三部分。土地利用和土地覆盖的变化:森林和树木覆盖草原7。人类住区第四部分:环境后果:大气化学与空气质量土壤10。水文与水质第五部分:人类驱动力人口与收入技术13。政治经济制度。文化和文化变革第六部分:数据和建模中的问题:15。陆地-大气相互作用的模拟:简要综述在一个综合框架中模拟全球变化:来自社会科学的观点全球土地覆盖变化数据:获取、评估和分析。
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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
Pub Date : 1995-07-01 DOI: 10.2307/2996085
A. Heikens, P. A. Robertson, P. A. Robertson
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.
hekens, A. L. AND P. A. ROBERTSON(南伊利诺伊大学植物生物系,伊利诺伊州卡本代尔62901-6509)。伊利诺斯州南部的荒地和其他天然干旱林开口的分类。公牛。托里机器人。俱乐部122:203 - 214。1995- 1995年,采用改良的Daubenmire冠层盖度法,对美国伊利诺斯州南部22个不同底物上的天然干旱林开阔地进行了植物群落类型的分类、描述和定义。以相似度百分比为相似性函数,采用非加权对群分类方法,对裸地、干旱林、砂岩林地、黄土丘陵草原和石灰岩林地的植物群落类型进行了聚类分析。有些植被类型与底物密切相关(如石灰岩沼泽、砂岩沼泽),而另一些则反映演替状态(如干旱林和荒地)。判别分析发现,土壤pH值、土壤深度、土壤质地、裸露岩石量、坡角、阳离子交换容量和土壤养分是不同群落类型的显著判别因子。22个地点中有4个是贫瘠的,这是中西部一个濒临灭绝的植物群落(hekens and Robertson 1994)。裸地以露天树种为主,主要为星栎(Quercus stellata)和马兰栎(Quercus marilandica),混合有草原和旱地草本植物,包括荆芥(Schizachyrium scoparium)、丹冬(Danthonia spicata)、向日葵(Helianthus spp.)和大叶蕨(Chasmanthium latifolium),岩石裸露1-5%,砂岩、页岩和燧石基质的土壤深度为8-15 cm。在这个地区,荒地似乎是一种时间越界的群落,它们是曾经广泛分布的群落类型的残余,除非受到火灾或其他干扰过程的维持,否则将接替森林。
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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)。
Pub Date : 1995-07-01 DOI: 10.2307/2996086
K. Bruce, G. Cameron, P. Harcombe
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.
BRUCE, K. B., G. N. CAMERON(休斯顿大学生物系,休斯顿,德克萨斯州77204)和P. A. HARCOMBE(莱斯大学生态和进化生物学系,休斯顿,德克萨斯州77251)。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)。公牛。托里机器人。俱乐部122:215 - 225。1995.-采用时间序列法(林龄0 ~ 20年)研究了中国牛脂树对德克萨斯州上海岸草原的入侵,并了解这种外来植物是否会被本土林地物种所取代。这次入侵标志着群落结构的巨大转变。在演替过程中,随着禾本科植物和草本植物被乔木和灌木所取代,植物的优势地位发生了迅速的变化(在冠层闭合前10年)。树木的大小频率分布表明林分的年龄不均匀。在最老的三个年龄级中,许多林分表现出单调的树高递减分布。因为中国牛脂在建立后不久就产生种子,所以密度的迅速增加似乎可能是最初的树木作为种子来源的结果。在调查中出现的最常见的本地树木通常是当地河岸地区的小种子居民,例如,hackberries (Celtis laevigata), elm (Ulmus americana), green ash (Fraxinus pennsylvania)和yaupon (Ilex vomitoria)。这些物种的低密度表明,与牛脂虫相比,它们的入侵速度较慢。目前,林分实际上是单一的。然而,随着林龄的增加,非脂类物种的密度显著增加,这表明这些林地在未来可能会变得更加多样化。
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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
Pub Date : 1995-07-01 DOI: 10.2307/2996083
J. Luken, T. C. Tholemeier, B. Kunkel, L. M. Kuddes
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引用次数: 32
Intermountain Flora, Volume Five: The Asterales. 《山间植物志》第五卷:星形植物。
Pub Date : 1995-07-01 DOI: 10.2307/2996090
S. Clemants, A. Cronquist
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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
Pub Date : 1995-07-01 DOI: 10.2307/2996084
Richard E. Snook, F. Day
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.
预测生物量和生物量变化。本研究的目的是确定在海岸堰洲岛沙丘生态系统中,根系长度、平面面积和生物量之间是否存在预测性的群落水平异速生长关系。在Hog岛(弗吉尼亚海岸保护区-长期生态研究站点的一部分),按时间顺序(6年、24年、36年和120年)每月从四个沙丘和沼泽区提取细根样本。主要的生命形式是沙丘上的多年生根状草本植物和较年轻的洼地和较老的洼地中的灌木。5月和8月根系平面面积回归关系较强,冬季变化较大。采用协方差分析(ANCOVA)检验样本日期间回归斜率的异质性。根长和面积模型在生长季节均表现出较大的斜率。最老沙丘遗址的回归坡度在长度和面积上均无明显季节差异。来自洼地的数据比沙丘的数据具有更强的预测关系。这些结果为该系统根系生物量的间接估算提供了基础。
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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
Pub Date : 1995-07-01 DOI: 10.2307/2996087
J. Baskin, D. H. Webb, C. Baskin
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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
Pub Date : 1995-07-01 DOI: 10.2307/2996082
S. Carlquist, E. J. Wilson
CARLQUIST, SHERWIN AND ERIKA J. WILSON (Santa Barbara Botanic Garden, 1212 Mission Canyon Road, Santa Barbara, CA 93105). Wood anatomy of Drosophyllum: ecological and phylogenetic considerations. Bull. Torrey Bot. Club 122:185-189.-Drosophyllum lusitanicum, the sole woody species of Droseraceae, has wood anatomical features very much like those of Dioncophyllaceae and Nepenthaceae. Features in common include vessel elements with simple perforation plates, fibriform vessel elements, tracheids with large fully bordered pits, diffuse (plus variously grouped) axial parenchyma, and paedomorphic rays 1-2 cells wide. Wood anatomy thus validates the close relationships claimed among Drosophyllum, Dioncophyllaceae, and Nepenthaceae on the basis of recent DNA studies. Wood anatomy of Drosophyllum is xeromorphic, in accord with the dry habitats of the species.
卡尔奎斯特,舍温和埃里卡·j·威尔逊(圣巴巴拉植物园,使命峡谷路1212号,圣巴巴拉,CA 93105)。果蝇的木材解剖:生态学和系统发育的考虑。公牛。托里机器人。俱乐部122:185 - 189。——lusitanicum drosophhyllum lusitanicum是Droseraceae中唯一的木本树种,其木材解剖特征与酒黄科和蛇舌草科非常相似。常见的特征包括具有简单穿孔板的导管分子,纤维状导管分子,管胞具有大的全缘凹陷,弥漫性(加上不同组合的)轴向薄壁组织和1-2个细胞宽的胚形射线。因此,在最近的DNA研究基础上,木材解剖学证实了果蝇科、龙胆科和龙胆科之间的密切关系。其木材解剖结构为旱生型,与该树种的干燥生境一致。
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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
Pub Date : 1995-04-01 DOI: 10.2307/2996454
B. Middleton
the bucket with bottom removed, and two 2-liter beverage bottles for flotation. The total cost of one pair of seed rain and hydrochore traps was less than $1.00. The seed dispersal estimates from the aquatic seed traps reflected the relative numbers of species and seeds dispersed in aquatic systems. A test of the efficiency of the aquatic seed traps demonstrated that traps placed in a swamp over a period of a month captured 1.8 times the biomass of debris and seeds than were present on the surface of the water at any given time.
桶底去除了,两个2升的饮料瓶用于浮选。一对种子雨和疏水器的总成本不到1美元。水生捕种器的种子传播估计反映了水生系统中分散的物种和种子的相对数量。对水生种子陷阱效率的测试表明,在一个月的时间里,放置在沼泽中的陷阱捕获的碎片和种子的生物量是水面上任何给定时间的1.8倍。
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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。
Pub Date : 1995-04-01 DOI: 10.2307/2996456
D. Gibson, G. Whitney
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引用次数: 391
期刊
Bulletin of the Torrey Botanical Club
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