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Leaf production and shoot dynamics of Thalassia testudinum by a direct census method Martínez-Daranas, B.; Alcolado, P.M.; Duarte, C.M. (2005). Leaf production and shoot dynamics of Thalassia testudinum by a direct census method. Aquat. Bot. 81(3): 213-224. https://dx.doi.org/10.1016/j.aquabot.2004.12.003 In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 352176 [ aanvragen ]

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Trefwoorden

Anatomical structures > Body organs > Plant organs > Shoots Biological production > Primary production Growth rate Leaf Physics > Mechanics > Dynamics Properties > Physical properties > Density Water bodies > Inland waters > Wetlands Thalassia testudinum K.D.Koenig, 1805 [WoRMS] ASW, Greater Antilles, Cuba [Marine Regions] Marien/Kust

Author keywords

Thalassia testudinum; leaf production; shoots density; demography;dynamics; Cuba

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Auteurs		Top
Martínez-Daranas, B. Alcolado, P.M. Duarte, C.M., meer

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Abstract

The annual leaf growth and shoot dynamics of Thalassia testudinum were examined in a meadow located near Havana City, Cuba, using direct censuses between January 1995 and January 1996. The net rate of shoot population change, specific shoot recruitment and mortality rates were calculated as the difference between the densities of shoots (tagged or untagged) in consecutive sampling events. The leaf biomass, the daily production, the turnover rate and the rate of leaf biomass loss were also estimated. The estimated mean dry leaf biomass (124.9 ± 9.5 g m-2), daily dry leaf production (3.3 ± 0.2 g m-2 day-1) and turnover rate (2.7 ± 0.1% day-1) were comparable to values previously reported for this species in Cuba and elsewhere. The production of leaves and shoots were higher in spring, declined towards mid summer, and showed the minimum values in January. Shoot recruitment prevailed over shoot mortality from January to March and from July to August, whereas most of the annual shoot mortality occurred between May and July and between August and October. The meadow examined was in close demographic balance along the study period. The results demonstrate that direct census provides reliable estimates of rapid shoot dynamics in T. testudinum.

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