Durvillaea antarctica Production in Relation to Nutrient Cycling at Marion Island
Durvillaea antarctica Production in Relation to Nutrient Cycling at Marion Island
复制标题
南极杜维拉菌生产与马里恩岛养分循环的关系
DOI：
10.1007/978-3-642-82275-9_87
复制
发表时间：
1985
期刊：
影响因子：
--
通讯作者：
J. Grindley
中科院分区：
文献类型：
--
作者：
P. G. Haxen;J. Grindley
本文介绍了马里恩岛Durvillaea anaparticaat的生产情况，包括其与较高营养级的相互关系。生物量的海岸与不同程度的曝光。航摄资料显示，48%的海岸暴露于涌浪直接冲击之下，33%的海岸被遮蔽或与涌浪方向平行，15%为大卵石或块状海岸，2%为桑迪或小卵石海滩。D.南极洲约3，300吨（西半球），沿着岛上每种海岸分布的比例各不相同。热量含量随季节和植物器官而变化。招募一般在8月以后在秋冬风暴过后可供使用的地点进行。在一个重新定殖的海带孢子林中，生产量相当于172 × 103kJ m−2。低侵蚀率和高死亡率是D。南极洲种群造成死亡的主要因素是潮间带食草动物的放牧和偶尔的猛烈风暴。固着器被无聊的等足类动物削弱了。受影响的植物在风暴期间被撕裂并扔到海滩上，在那里它们受到喷雾区放牧端足类的攻击。在这个区域之外，分解通过细菌作用发生。
An account is presented of the production ofDurvillaea antarcticaat Marion Island, including its inter-relationships with higher trophic levels. Biomass was determined for shores with differing degrees of exposure. Data from aerial photography indicated that 48% of the coast is exposed and directly struck by swells, 33% is sheltered or parallel to swell direction, 15% is large boulder or block shore, and 2% is sandy or small-pebble beach. The total fresh mass ofD. antarctica, approximately 3,300 t (ww), is situated with varying proportion along each shore type of the island. Calorific content varies with season and with plant organ. Recruitment generally takes place after August on sites having become available after autumn and winter storms. Production in a re-colonizing stand of kelp sporelings is equivalent to 172 × 103kJ m−2. Low erosion rate and high mortality is a feature of theD. antarcticapopulation. The primary contributors to mortality are grazing by intertidal herbivores and occasional, violent storms. Holdfasts are weakened by boring isopods. Affected plants are torn free and cast onto beaches during storms, where they are attacked by grazing Amphipoda in the spray zone. Beyond this zone, decomposition takes place through bacterial action.