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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, more
Peer reviewed article  
Available in  Authors 
Keywords
    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]
    Marine/Coastal
Author keywords
    Thalassia testudinum; leaf production; shoots density; demography;dynamics; Cuba
Authors  Top 
  • Martínez-Daranas, B.
  • Alcolado, P.M.
  • Duarte, C.M., more
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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