Distribution Patterns of West Indian Mosses
Distribution Patterns of West Indian Mosses
复制标题
西印度苔藓的分布模式
DOI:
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发表时间:
1969
期刊:
影响因子:
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通讯作者:
M. R. Crosby
中科院分区:
文献类型:
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作者:
M. R. Crosby
Distributions of West Indian mosses are analyzed in detail. The West Indies is an area of rather high species endemism, although a large portion of the species is common throughout much of tropical America. The relationship between the Greater Antilles and South America is much stronger than expected. The relationships of the West Indian species of Pilotrichum indicate some of the patterns of migration of mosses to the West Indies. Using revisions, most of which have appeared in the last 25 years, I have summarized the distribution of 230 species of mosses which occur in the West Indies. The entire West Indian moss flora is much larger than this, of course. Crum and Bartram (1958) record 3 16 species from Jamaica. It is hoped that the selection of groups used in this survey reflects in a fairly representative fashion the kinds of patterns which the remaining mosses have. Revisions have been used because it is felt that, generally, the taxonomy is better in these than in floras. A few records for well-known species have been taken from island floras and check lists (e.g., Crum & Bartram, 1958; Crum & Steere, 1957; Bartram, 1955). The sources of data I have relied on are the following treatments of genera and families: Fissidentaceae (Grout, 1943); Dicranaceae (Williams, 191 3a); Leucobryaceae (Williams, 1913b); Calymperes (Reese, 1961); Orthotrichaceae (Grout, 1946); Pterobryaceae (Arzeni, 1954); Neckeraceae (Wagner, 1951); Hookeriaceae (Welch, 1962, 1966, 1969), Daltonia (Bartram, 1931); Pilotrichum (Crosby, 1969). A chart was made for the distribution of each species. The occurrence of each was recorded for all the major West Indian islands, Mexico, and the countries of Central and South America. In some cases it was possible to list only "West Indies," "Central America," or "South America." Thus the totals for some of the special tables may not agree with the total for the whole West Indies. Trinidad and Tobago were treated together and a record kept for them. These were eventually considered part of South America. For purposes of this discussion Mexico is part of Central America. Table 1 summarizes the distribution of West Indian mosses. A small portion (ca. 1% ) of the species are pan-tropical. Examples include Fissidens asplenioides Hedw. and Octoblepharum albidum Hedw. The species which occur in the West Indies and otherwise only in North America (ca. 4% ) are of two kinds-those which have tropical affinities and barely reach North America, e.g., Calymperes nashii Williams and Cyclodictyon varians (Sull.) 0. Kuntze, and those which barely reach the tropics from the north, e.g., Orthotrichum anomolum Hedw. The species which occur in the West Indies and North America as well as Central and South America make up 8 % of the total. These are mainly species with tropical affinities which extend their range into the southeastern United States. 1Missouri Botanical Garden, 2315 Tower Grove Avenue, St. Louis, Missouri 63110. ANN. MISSOURI BOT. GARD. 56: 409-416. 1969. This content downloaded from 157.55.39.78 on Mon, 20 Jun 2016 07:26:18 UTC All use subject to http://about.jstor.org/terms