He Qin-Fei, Fan Hang-Qing, Mo Zhu-Cheng, Wang Xin, Shen Wen-Hui
Guangxi Mangrove Research Center, Guangxi Key Laboratory for Mangrove Conservation, Beihai 536000, Guangxi, China.
Ying Yong Sheng Tai Xue Bao. 2012 Apr;23(4):947-52.
Digging Phascolosoma esculenta to increase income is one of the main causes leading to the degradation of China mangroves. In order to understand the impact mechanisms of digging P. esculenta on the mangrove growth and to select indicators to evaluate the mangrove health, a simulative study was conducted to clarify the impacts of digging depth, radian, and frequency on the growth of 1-year old Avicennia marina seedlings, with the indices seedling height, basal diameter, single leaf area, specific leaf area, total biomass, and dead root dry mass measured. The results showed that digging activities decreased the increment of seedling height and basal diameter, single leaf area, specific leaf area, and total biomass significantly, and increased the dead root dry mass markedly. Digging depth and radian had obvious effects on the growth of A. marina seedlings, but digging frequency had minor effects. When the digging depth was < 5 cm, digging radian was < 240 degrees, and digging frequency was < 2 times per month, the damage to the seedlings was slighter; but when the digging depth was > 5 cm, the damage was quite serious.
挖掘可口革囊星虫以增加收入是导致中国红树林退化的主要原因之一。为了解挖掘可口革囊星虫对红树林生长的影响机制，并选择评估红树林健康状况的指标，开展了一项模拟研究，以阐明挖掘深度、弧度和频率对1年生白骨壤幼苗生长的影响，并测量了幼苗高度、基径、单叶面积、比叶面积、总生物量和死根干质量等指标。结果表明，挖掘活动显著降低了幼苗高度、基径、单叶面积、比叶面积和总生物量的增量，并显著增加了死根干质量。挖掘深度和弧度对白骨壤幼苗的生长有明显影响，但挖掘频率影响较小。当挖掘深度<5厘米、挖掘弧度<240度且挖掘频率<每月2次时，对幼苗的损害较小；但当挖掘深度>5厘米时，损害相当严重。
