SEEDLING SURVIVORSHIP, GROWTH, AND RESPONSE TO DISTURBANCE IN BELIZEAN MANGAL

被引:110
作者
ELLISON, AM [1 ]
FARNSWORTH, EJ [1 ]
机构
[1] HARVARD UNIV,BIOL LABS,DEPT ORGANISM & EVOLUTIONARY BIOL,CAMBRIDGE,MA 02138
关键词
D O I
10.2307/2445541
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Species zonation patterns across tidal gradients in mangrove forests are for-med by successful seedling establishment and maintained by replacement of adults by conspecific seedlings. These two processes rarely have been examined experimentally in neotropical mangal. We studied survivorship and growth of seedlings of two species of mangrove, Rhizophora mangle L. and Avicennia germinans (L.) Steam, across a tidal gradient in Belize, Central America. Propagules of each species were planted in common gardens at tidal elevations corresponding to lowest low water (LLW), mean water (MW), and highest high water (HHW). Sixty-nine percent of Rhizophora seedlings planted at MW and 56% of those planted at LLW survived 1 year. Forty-seven percent of MW Avicennia seedlings also survived 1 year. No individuals of either species survived at HHW, and neither did any LLW Avicennia seedlings. Among the surviving Rhizophora seedlings, LLW seedlings grew more rapidly in terms of height, diameter, leaf production, and biomass than did MW seedlings. Insect herbivory was twice as high on MW seedlings as on LLW Rhizophora seedlings. We also examined the response of established Rhizophora seedlings to experimental removal of the adult Rhizophora canopy. Seedlings in canopy removal areas had higher survivorship, grew twice as fast, produced more leaves, and had less than half the herbivory of seedlings growing beneath an intact canopy. These results provide insights into underlying causes and maintenance of zonation in Caribbean mangrove forests.
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页码:1137 / 1145
页数:9
相关论文
共 63 条
[1]  
[Anonymous], 1967, LIFE ZONE EC LIFE ZO
[2]   PATTERNS OF SECONDARY SUCCESSION IN A MANGROVE FOREST OF SOUTHERN FLORIDA [J].
BALL, MC .
OECOLOGIA, 1980, 44 (02) :226-235
[3]   SALINITY TOLERANCE IN THE MANGROVES AEGICERAS-CORNICULATUM AND AVICENNIA-MARINA .1. WATER-USE IN RELATION TO GROWTH, CARBON PARTITIONING, AND SALT BALANCE [J].
BALL, MC .
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY, 1988, 15 (03) :447-464
[4]   PHYSIOLOGICAL ECOLOGY OF TROPICAL SUCCESSION - A COMPARATIVE REVIEW [J].
BAZZAZ, FA ;
PICKETT, STA .
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1980, 11 :287-310
[5]   PHYSIOLOGICAL ECOLOGY OF PLANT SUCCESSION [J].
BAZZAZ, FA .
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1979, 10 :351-371
[6]  
Becker R. A., 1988, NEW S LANGUAGE
[7]   EFFECTS OF GRAZING BY A CHRYSOMELID BEETLE, GASTROPHYSA-VIRIDULA, ON COMPETITION BETWEEN RUMEX-OBTUSIFOLIUS AND RUMEX-CRISPUS [J].
BENTLEY, S ;
WHITTAKER, JB .
JOURNAL OF ECOLOGY, 1979, 67 (01) :79-90
[8]   DETERMINANTS OF PATTERN IN A NEW-ENGLAND SALT-MARSH PLANT COMMUNITY [J].
BERTNESS, MD ;
ELLISON, AM .
ECOLOGICAL MONOGRAPHS, 1987, 57 (02) :129-147
[9]   PHOSPHORUS AND NITROGEN NUTRITIONAL-STATUS OF A NORTHERN AUSTRALIAN MANGROVE FOREST [J].
BOTO, KG ;
WELLINGTON, JT .
MARINE ECOLOGY PROGRESS SERIES, 1983, 11 (01) :63-69
[10]   SOIL CHARACTERISTICS AND NUTRIENT STATUS IN A NORTHERN AUSTRALIAN MANGROVE FOREST [J].
BOTO, KG ;
WELLINGTON, JT .
ESTUARIES, 1984, 7 (01) :61-69