Role of Terrestrial Bromeliads in Nutrient Cycling, Restinga da Marambaia, Brazil

ABSTRACT This study quantified the aboveground biomass and nutrient contents in terrestrial bromeliads in a dune forest at Restinga da Marambaia, RJ. Data of individuals in “quadrats” (4 m2) marked on a line perpendicular to the sea were collected in August 2001. Diameter (d) and height (h) were the variables that best correlated with the biomass of Quesnelia quesneliana, which presented highest biomass and concentrations of K. The total number of leaves was the variable that best correlated with the biomass of Billbergia amoena and Neoregelia cruenta. N. cruenta presented the highest concentrations of N and P. Nutrient contents were higher in Q. quesneliana.

摘要 本研究对巴西里约热内卢州马林巴亚沙丘林（Restinga da Marambaia）内的陆生凤梨科植物的地上生物量与养分含量开展了定量测定。研究于2001年8月，采集了沿垂直于海岸线的样线布设的4平方米样方（quadrats）内的个体相关数据。株径（d）与株高（h）是与奎斯内尔凤梨（Quesnelia quesneliana）生物量相关性最高的变量，该物种同时拥有最高的生物量及钾（K）元素浓度。总叶数则是与美花比尔贝亚凤梨（Billbergia amoena）及深红新吊凤梨（Neoregelia cruenta）生物量相关性最高的变量。深红新吊凤梨（N. cruenta）的氮（N）与磷（P）元素浓度最高。奎斯内尔凤梨（Q. quesneliana）的整体养分含量更高。