Dinâmica populacional de Halodule wrightii Ascherson e sua fauna e flora associada em Cabo Frio RJ

• Autor(a) principal: Marques, Leonardo Vidal
• Data de Publicação: 2010
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/4911
• topic: Halodule wrightii; Seagrass; Population dynamics; Ilha do Japonês; Sunspot; Fauna and Flora associated; Growth; Halodule wrightii; Gramas marinhas; Dinâmica populacional; Ilha do Japonês; Manchas solares; Fauna e Flora associada; Crescimento; Biologia marinha - Cabo Frio (RJ); Flora marinha - Cabo Frio (RJ); Fauna marinha - Cabo Frio (RJ); Ecologia vegetal; CNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA

Seagrass are flowering plants adapted to coastal marine environments of most continents of the world. Seagrasses form extensive meadows and provide valuable resources in shallow coastal waters worldwide, serving as food and nursery areas for important species of commercial and recreational fish. This study is: a review of the state of knowledge up to now of seagrass in Brazil; an assessment of the importance of long-term monitoring and the influence of long-term environmental factors, such as sunspot number; an analysis of the spacial distribution of seagrass and its associated flora and fauna; an investigation of the growth of Halodule wrightii in two spatially discrete extreme environmental conditions (exposed at low tide cycle and permanently submerged). The literature review on the seagrass was comprehensive and verified the existence of some gaps in knowledge. By monitoring over the long term it could be observed that the number of sunspots has a strong negative relationship with the canopy height of seagrass in the intertidal region. The variation of tides in the intertidal region is directly related to the spatial distribution of Halodule wrightii, and consequently the distribution of fauna and flora associated. Under different environmental conditions the variation in shoot growth of Halodule wrightii is compensated for by variations in the distribution of biomass in the plants, such as canopy height, density and biomass of shoots. The long-term monitoring may allow action to be the taken in order to assist in the management and recovery of these important coastal habitats.