MARC details
| 000 -LEADER |
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| fixed length control field |
02560nam a2200277Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20250625160225.0 |
| 040 ## - CATALOGING SOURCE |
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| Transcribing agency |
CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
B-18226 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT |
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| Title |
Dioecism in tropical forest trees. |
| 490 0# - SERIES STATEMENT |
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| Volume/sequential designation |
Evolution, p.167-179, 1975 |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
In tropical lowland forests, one fourth to one half of all species have unisexual flowers, and a majority of such species are dioecious. Almost all dioecious species have relatively small (? 1.0 cm in length and breadth)pale yellow to pale green flowers. Field observations of selected species indicate that a large number of dioecious species are pollinated by small bees such as various species of Anthophoridae, Halictidae, Megachilidae and Meliponinae, while a small number is pollinated by moths. In the light of the high incidence of dioecism and the prevalence of entomophily in tropical trees, it is suggested that as far as tropical trees are concerned, anemophily cannot be invoked to explain the origin of dioecism (and monoecism)as has been done for temperate plants. In order to explain the evolution of dioecism in tropical trees, it is postulated that, with the exception of a few taxa where dioecism has evolved from heterostyly, in a majority of investigated species dioecism has probably evolved from a self-compatible breeding system in response to selective pressure for outcrossing. The main question on which attention is focused is: When selective pressure for outcrossing arises, what favors the evolution of dioecy over self-incompatibility? Four specific hypotheses are proposed which provide possible answers to the question. These are based on the assumptions of relative ease with which dioecism can arise, increased pollination success allowed by dioecism under certain conditions, enhanced escape from seed predators under a dioecious breeding system and the ability of dioecious species to exploit a wider variety of microhabitats than hermaphroditic species. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
BAKER'S LAW |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
COMMUNITY ASSEMBLY |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
COMMUNITY COMPOSITION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
DETERMINANTS OF PLANT COMMUNITY DIVERSITY AND STRUCTURE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
FOREST SUCCESSION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
FUNCTIONAL TRAITS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
SEXUAL SYSTEM |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
TROPICAL FOREST |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Bawa, K. S. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Opler, P. A. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
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| Uniform Resource Identifier |
<a href="https://drive.google.com/file/d/11aRhwlPwM-GbtD8RJMB8snMkp7kb9iRT/view?usp=drivesdk">https://drive.google.com/file/d/11aRhwlPwM-GbtD8RJMB8snMkp7kb9iRT/view?usp=drivesdk</a> |
| Public note |
Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Clasificación local |
| Koha item type |
Documentos solicitados |
