Study on the Recovery of the Intertidal communities on Seawall from the Environmental Disturbances caused by Unusual Hot weather

异常炎热天气环境扰动下海堤潮间带群落的恢复研究

基本信息

批准号：
16580276
负责人：
KADO Ryusuke
金额：
$ 1.73万
依托单位：
Kitasato University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

We have studied to aim recovery of the Intertidal communities on seawall from the environmental disturbances caused by unusual hot weather in 1998, especially focusing on intertidal barnacle, Semibalanus carious and its ecological role. Field studies have been conducted at Sakihama seawall in Okkirai Bay, Iwate Prefecture. during 2004-2006. PVC test plates have been set on the wall with different distances from wall to prevent predators such as sea-urchin and snails. We also investigated the effect of surface roughness for recruitment of sessile organisms by using concrete panels with different convexo-concavities. Effect of pedation by S. intermedius was investigated for barnacles and mussels in laboratory conditions.As a result of field experiments, first we found that recovery of the intertidal communities will be possible if predators such as sea-urchin Strongyrocentrotus intermedius and snails could be controlled. Laboratory experiments proved that S. intermedius preys on barnacles and mussels if the preys are small. Second, intertidal barnacle Semibalanus cariosus which is a dominant species in northern Pacific coast is essential to build up intertidal communities on the seawalls as a subsuate for secondary sessile organisms such as mussel Mytilus galloprovincialis brown alga Undaria pinnatifida, and red alga Analypus japonicus. Third, convexo-concavities are effective to facilitate recruitment of sessile organisms, but concavities tends to be filled by small sedentary animals such as bryozoans and serpulids. It seems important to set or put concavities on seawalls at an appropriate season to form long-lasting intertidal communities.For future study, it is important to invent a way to eliminate sea-urchin S. intermedius with easy to manage to form and preserve intertidal communities. This concept will be applicable for subtidal communities and may give a hint to recover from rocky-shore denudation.

我们已经研究了旨在从1998年由异常炎热的天气引起的环境障碍中恢复海堤上的潮间带社区，尤其是专注于潮间带的barnacle，sembalanus carious及其生态作用。现场研究是在伊瓦特县Okkirai湾的Sakihama Seawall进行的。在2004-2006期间。 PVC测试板已设置在墙上，与墙壁不同，以防止捕食者（例如海charchin和蜗牛）。我们还通过使用具有不同凸孔的混凝土面板来研究表面粗糙度对募集无孔生物的影响。在实验室条件下，研究了Intermedius的藤枝和贻贝的伪造的影响。由于现场实验的结果，首先我们发现，如果可以控制诸如Sea-Curchin strongyrocentrotus Intermedius和Snails之类的捕食者，则可以控制潮间带的群落。实验室实验证明，如果猎物很小，则在藤壶和贻贝上捕食链球菌。其次，在北太平洋海岸的潮间带semibalanus cariosus是北太平洋海岸的主要物种，对于建立在海墙上的潮间带社区至关重要，因为墨西斯贻贝mytilus mytilus galloprovincialis brown alga brown alga unga undaria pinnatifida和红色的阿尔加·阿尔加·阿尔加·阿尔加·阿莫尔加·阿莫尔加（Red Alga Analypus japonicus）都有梅塞尔·加普罗维氏蛋黄酱的次要生物体。第三，凸形腔有效地有效地促进了无柄生物的募集，但是凹面往往被小型久坐的动物（例如bryozoans and serpulids）所填充。在适当的季节将凹入式凹入以形成长期潮间的社区似乎很重要。对于将来的研究，发明一种消除Sea-Chorpin S. Intermedius的方法很重要，可以易于形成并保留潮间带社区。这个概念将适用于潮汐社区，并可能有暗示从岩石岛的剥夺中恢复。