Experimental evaluation of the effects of siltation-derived changes in sediment conditions on the Philippine seagrass Cymodocea rotundata

被引:50
作者
Halun, Z
Terrados, J
Borum, J
Kamp-Nielsen, L
Duarte, CM
Fortes, MD
机构
[1] Univ Philippines, Inst Marine Sci, CS, Quezon City 1101, Philippines
[2] CSIC, Ctr Estudios Avanzados Blanes, Blanes 17300, Spain
[3] Univ Copenhagen, Freshwater Biol Lab, DK-3400 Hillerod, Denmark
[4] UIB, CSIC, Grp Oceanog Interdisciplinar, Inst Mediterraneo Estudios Avanzados, Esporles, Islas Baleares, Spain
关键词
Cymodocea rotundata; seagrass biomass and growth; siltation; sulfide;
D O I
10.1016/S0022-0981(02)00366-0
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
This study investigated if siltation-associated changes in the sediments are detrimental to seagrasses. We chose Cymodocea rotundata as the test species because it is considered one of the Southeast Asian seagrass species most sensitive to siltation. The approach included the (1) evaluation of the effects of silted sediments on plant growth, evaluation of the effects of in situ sulfide additions to the sediment on (2) the production of shoots, rhizomes and roots, and on the elongation rate of the horizontal rhizomes of plants located at the edge of a meadow, and on (3) leaf growth, mass allocation patterns and shoot density in a well-developed seagrass meadow. The results showed that under high light availability, major changes in sediment conditions associated with siltation did not negatively affect the plants but enhanced their growth likely by increasing the availability of nutrients. Pore water sulfide concentrations of 1 mM reduced by more than half the production of shoots, rhizome and roots, and the elongation rates of horizontal rhizomes of C rotundata plants at the edge of the meadow, but had no effects on leaf growth and shoot density in a well-developed C rotundata meadow. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:73 / 87
页数:15
相关论文
共 37 条
[1]   PHYSIOLOGICAL AND MORPHOLOGICAL RESPONSES OF THE SEAGRASS ZOSTERA-CAPRICORNI ASCHERS TO LIGHT-INTENSITY [J].
ABAL, EG ;
LONERAGAN, N ;
BOWEN, P ;
PERRY, CJ ;
UDY, JW ;
DENNISON, WC .
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY, 1994, 178 (01) :113-129
[2]   Nutrient limitation of Philippine seagrasses (Cape Bolinao, NW Philippines): In situ experimental evidence [J].
Agawin, NSR ;
Duarte, CM ;
Fortes, MD .
MARINE ECOLOGY PROGRESS SERIES, 1996, 138 (1-3) :233-243
[3]   IGNITION METHOD FOR DETERMINATION OF TOTAL PHOSPHORUS IN LAKE SEDIMENTS [J].
ANDERSEN, JM .
WATER RESEARCH, 1976, 10 (04) :329-331
[4]   Species composition and plant performance of mixed seagrass beds along a siltation gradient at Cape Bolinao, The Philippines [J].
Bach, SS ;
Borum, J ;
Fortes, MD ;
Duarte, CM .
MARINE ECOLOGY PROGRESS SERIES, 1998, 174 :247-256
[5]  
Buchanan J. B., 1984, METHODS STUDY MARINE, V16, P41, DOI DOI 10.1002/9781118542392
[6]  
CARLSON PR, 1994, B MAR SCI, V54, P733
[7]   SPECTROPHOTOMETRIC DETERMINATION OF HYDROGEN SULFIDE IN NATURAL WATERS [J].
CLINE, JD .
LIMNOLOGY AND OCEANOGRAPHY, 1969, 14 (03) :454-&
[8]   Radial oxygen loss from intact roots of Halophila ovalis as a function of distance behind the root tip and shoot illumination [J].
Connell, EL ;
Colmer, TD ;
Walker, DI .
AQUATIC BOTANY, 1999, 63 (3-4) :219-228
[9]   PHOTOSYNTHETIC RESPONSES OF ZOSTERA-MARINA L (EELGRASS) TO INSITU MANIPULATIONS OF LIGHT-INTENSITY [J].
DENNISON, WC ;
ALBERTE, RS .
OECOLOGIA, 1982, 55 (02) :137-144
[10]   EFFECTS OF LIGHT ON SEAGRASS PHOTOSYNTHESIS, GROWTH AND DEPTH DISTRIBUTION [J].
DENNISON, WC .
AQUATIC BOTANY, 1987, 27 (01) :15-26