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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
28/02/1995 |
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Data da última atualização: |
23/09/2025 |
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Autoria: |
YOUNG, K. R.; EWEL, J. J.; BROWN, B. J. |
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Título: |
Seed dynamics during forest succession in Costa Rica. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
Vegetatio, v. 71, n. 3, p. 157-173, 1987. |
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Idioma: |
Inglês |
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Conteúdo: |
Soil seed banks and current seed inputs each play a role in tropical succession. We compared the abundance and floristic composition of seeds from these two sources at a Costa Rican site by germinating seeds from the soil, measuring seed inputs for 3 yr, and monitoring the earliest colonists in a forest clearing. There were an estimated 6800 viable seeds/m2 in the soil of 3.3-yr-old vegetation, 9500 seeds/m2 in 11-yr old vegetation, and 7000 seeds/m2 in a 75-yr-old forest. An estimated 10100 seeds/m2 fell on the soil surface of the young successional vegetation during 3 yr and 3700 seeds/m2 fell during that same time in the forest. Locally produced seeds accounted for about 75 % of the seed input to the soil surface early in succession. Seeds dispersed out of young successional vegetation increased the quantity and species richness of the seed input and storage in an adjacent forest. Much of the species richness of the young successional vegetation resulted from seeds dispersed there from other communities by animals. Deforestation stimulated germination of most seeds in the surface soil of the old forest, including seeds of the dominant canopy tree. The recruitment of seedlings from the soil seed bank numerically overwhelmed that from post-disturbance seed rain and sprouts. We evaluated patterns of soil seed storage during succession and predicted the ability of vegetation of differing ages to respond to disturbance. Immediately after disturbance the number of seeds in the soil plum meted due to mortality, low inputs, and germination. As the vegetation regrew, the soil seed bank increased to a peak after 4 to 7 yr, then gradually decreased to its pre-disturbance size. High-frequency pulses of distur bance should result in reduced species richness, dominance by species with long-lived seeds, and fast recovery by seedling recruitment from the soil seed bank. MenosSoil seed banks and current seed inputs each play a role in tropical succession. We compared the abundance and floristic composition of seeds from these two sources at a Costa Rican site by germinating seeds from the soil, measuring seed inputs for 3 yr, and monitoring the earliest colonists in a forest clearing. There were an estimated 6800 viable seeds/m2 in the soil of 3.3-yr-old vegetation, 9500 seeds/m2 in 11-yr old vegetation, and 7000 seeds/m2 in a 75-yr-old forest. An estimated 10100 seeds/m2 fell on the soil surface of the young successional vegetation during 3 yr and 3700 seeds/m2 fell during that same time in the forest. Locally produced seeds accounted for about 75 % of the seed input to the soil surface early in succession. Seeds dispersed out of young successional vegetation increased the quantity and species richness of the seed input and storage in an adjacent forest. Much of the species richness of the young successional vegetation resulted from seeds dispersed there from other communities by animals. Deforestation stimulated germination of most seeds in the surface soil of the old forest, including seeds of the dominant canopy tree. The recruitment of seedlings from the soil seed bank numerically overwhelmed that from post-disturbance seed rain and sprouts. We evaluated patterns of soil seed storage during succession and predicted the ability of vegetation of differing ages to respond to disturbance. Immediately after disturbance the number of seeds in the ... Mostrar Tudo |
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Palavras-Chave: |
Dinâmica de sucessão; Forest. |
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Thesagro: |
Floresta; Semente. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02397naa a2200193 a 4500
001 1280207
005 2025-09-23
008 1987 bl uuuu u00u1 u #d
100 1 $aYOUNG, K. R.
245 $aSeed dynamics during forest succession in Costa Rica.$h[electronic resource]
260 $c1987
520 $aSoil seed banks and current seed inputs each play a role in tropical succession. We compared the abundance and floristic composition of seeds from these two sources at a Costa Rican site by germinating seeds from the soil, measuring seed inputs for 3 yr, and monitoring the earliest colonists in a forest clearing. There were an estimated 6800 viable seeds/m2 in the soil of 3.3-yr-old vegetation, 9500 seeds/m2 in 11-yr old vegetation, and 7000 seeds/m2 in a 75-yr-old forest. An estimated 10100 seeds/m2 fell on the soil surface of the young successional vegetation during 3 yr and 3700 seeds/m2 fell during that same time in the forest. Locally produced seeds accounted for about 75 % of the seed input to the soil surface early in succession. Seeds dispersed out of young successional vegetation increased the quantity and species richness of the seed input and storage in an adjacent forest. Much of the species richness of the young successional vegetation resulted from seeds dispersed there from other communities by animals. Deforestation stimulated germination of most seeds in the surface soil of the old forest, including seeds of the dominant canopy tree. The recruitment of seedlings from the soil seed bank numerically overwhelmed that from post-disturbance seed rain and sprouts. We evaluated patterns of soil seed storage during succession and predicted the ability of vegetation of differing ages to respond to disturbance. Immediately after disturbance the number of seeds in the soil plum meted due to mortality, low inputs, and germination. As the vegetation regrew, the soil seed bank increased to a peak after 4 to 7 yr, then gradually decreased to its pre-disturbance size. High-frequency pulses of distur bance should result in reduced species richness, dominance by species with long-lived seeds, and fast recovery by seedling recruitment from the soil seed bank.
650 $aFloresta
650 $aSemente
653 $aDinâmica de sucessão
653 $aForest
700 1 $aEWEL, J. J.
700 1 $aBROWN, B. J.
773 $tVegetatio$gv. 71, n. 3, p. 157-173, 1987.
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| 1. |  | TUCKER, M. A.; BÖHNING-GAESE, K.; FAGAN, W. F.; FRYXELL, J. M.; VAN MOORTER, B.; ALBERTS, S. C.; ALI, A. H.; ALLEN, A. M.; ATTIAS, N.; AVGAR, T.; BROOKS, H. B.; BAYARBAATAR, B.; BELANT, J. L.; BERTASSONI, A.; BEYER, D.; BIDNER, L.; VAN BEEST, F. M.; BLAKE, S.; BLAUM, N.; BRACIS, C.; BROWN, D.; BRUYN, P. J. de; CAGNACCI, F.; CALABRESE, J. M.; CAMILO-ALVES, C.; CHAMAILLÉ-JAMMES, S.; CHIARADIA, A.; DAVIDSON, S. C.; DENNIS, T.; DESTEFANO, S.; DIEFENBACH, D.; DOUGLAS-HAMILTON, I.; FENNESSY, J.; FICHTEL, C.; FIEDLER, W.; FISCHER, C.; FISCHHOFF, I.; FLEMING, C. H.; FORD, A. T.; FRITZ, S. A.; GEHR, B.; GOHEEN, J. R.; GURARIE, E.; HEBBLEWHITE, M.; HEURICH, M.; HEWISON, A. J. M.; HOF, C.; HURME, E.; ISBELL, L. A.; JANSSEN, R.; JELTSCH, F.; KACZENSKY, P.; KANE, A.; KAPPELER, P. M.; KAUFFMAN, M.; KAYS, R.; KIMUYU, D.; KOCH, F.; KRANSTAUBER, B.; LAPOINT, S.; LEIMGRUBER, P.; LINNELL, J. D. C.; LÓPEZ-LÓPEZ, P.; MARKHAM, A. C.; MATTISSON, J.; MEDICI, E. P.; MELLONE, U.; MERRILL, E.; MOURAO, G. de M.; MORATO, R. G.; MORELLET, N.; MORRISON, T. A.; DÍAZ-MUÑOZ, S. L.; MYSTERUD, A.; NANDINTSETSEG, D.; NATHAN, R.; NIAMIR, A.; ODDEN, J.; O'HARA, R. B.; OLIVEIRA-SANTOS, L. G. R.; OLSON, K. A.; PATTERSON, B. D.; PAULA, R. C. de; PEDROTTI, L.; REINEKING, B.; RIMMLER, M.; ROGERS, T. L.; ROLANDSEN, C. M.; ROSENBERRY, C. S.; RUBENSTEIN, D. I.; SAFI, K.; SAÏD, S.; SAPIR, N.; SAWYER, H.; SCHMIDT, N. M.; SELVA, N.; SERGIEL, A.; SHIILEGDAMBA, E.; SILVA, J. P.; SINGH, N.; SOLBERG, E. J.; SPIEGEL, O.; STRAND, O.; SUNDARESAN, S.; ULLMANN, W.; VOIGT, U.; WALL, J.; WATTLES, D.; WIKELSKI, M.; WILMERS, C. C.; WILSON, J. W.; WITTEMYER, G.; ZIEBA, F.; ZWIJACZ-KOZICA, T.; MUELLER, T. Moving in the anthropocene: global reductions in terrestrial mammalian movements. Science, v. 359, p. 466-469, jan. 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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