• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Damage from blast fishing and ecological factors influencing coral reef recovery in Indonesia.
【24h】

Damage from blast fishing and ecological factors influencing coral reef recovery in Indonesia.

机译：爆炸性捕鱼的破坏和影响印度尼西亚珊瑚礁恢复的生态因素。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Dynamite or “blast” fishing, in which homemade bombs are illegally detonated over coral reefs, threatens many reef ecosystems in Southeast Asia. This research investigated several ecological factors that affect hard coral (Coelenterata: Scleractinia) recovery after disturbance by blast fishing in Komodo National Park (KNP) and Bunaken National Park (BNP), Indonesia. To assess long-term impacts of blast fishing and improve management decisions about protection of intact reefs and potential restoration of damaged areas, it is necessary to investigate coral recovery.; Recovery from acute and chronic blasting was examined in craters of known age caused by single bombs and in rubble fields generated by persistent blasting. No significant natural coral recovery occurred over three years as measured by coral recruitment or colony size. High current was correlated with increased rubble movement, which was shown to be detrimental to the survival of small corals.; Successful recruitment and survival of juvenile corals are prerequisites of either natural recovery or human-assisted rehabilitation. Early scleractinian coral recruitment to settlement tiles was assessed in paired blasted and unblasted sites in KNP from 1998 to 2000. While significant spatial and temporal variation existed across sites and seasons, no significant difference in recruitment was found between blasted and unblasted sites, suggesting that blasted sites are not recruitment limited. Therefore, failure of hard corals to recover in rubble fields is due to post-settlement mortality, either from shifting rubble damaging new recruits or from competition with soft corals. While soft corals clearly had negative impacts on hard corals, the possibility that they also enhance later survival through substrate stabilization cannot be discounted.; Because natural recovery was low or nonexistent, reef rehabilitation was investigated. Three low-cost, locally available methods to stabilize rubble and recreate a structural foundation were tested in KNP. Significantly greater scleractinian recruitment occurred on the rock and cement experimental treatments compared to netting or untreated rubble; nevertheless most plots broke apart or were buried after 2.5 years. To address these problems, larger-scale rock piles were installed. Two years post-installation, coverage by hard corals on the rocks continues to increase; this method is potentially a pragmatic large-scale rehabilitation technique.
机译：炸药或“爆炸式”捕鱼活动，在珊瑚礁上非法引爆自制炸弹，威胁到东南亚的许多珊瑚礁生态系统。这项研究调查了印度尼西亚科莫多国家公园（KNP）和布纳肯国家公园（BNP）的爆炸性捕鱼扰乱后影响硬珊瑚（Coelenterata：Scleractinia）恢复的几种生态因素。为了评估爆炸性捕捞的长期影响并改进有关保护完整礁石和可能破坏区域的恢复的管理决定，有必要调查珊瑚的恢复情况。在单个炸弹造成的已知年龄的陨石坑和持续爆破产生的瓦砾场中检查了急性和慢性爆破的恢复情况。根据珊瑚募集或种群规模，三年来没有发生明显的天然珊瑚恢复。高电流与瓦砾运动增加有关，这被证明对小珊瑚的生存有害。成功招募和存活的幼小珊瑚是自然恢复或人类辅助康复的前提。从1998年至2000年，在KNP的成对爆破和未爆破地点评估了早期巩膜珊瑚招募到定居地块的情况。尽管跨地点和季节存在明显的时空变化，但爆破和未爆破地点之间没有发现明显的招募差异。网站不受招聘限制。因此，坚硬的珊瑚无法在瓦砾场中恢复是由于沉降后的死亡率，这可能是由于瓦砾的转移损害了新兵或与软珊瑚的竞争所致。虽然软珊瑚显然对硬珊瑚有负面影响，但它们也不能通过底物稳定而增加后期生存的可能性不容小discount。由于自然恢复较低或根本不存在，因此对珊瑚礁的恢复进行了研究。在KNP中测试了三种低成本，本地可用的方法来稳定瓦砾并重建结构基础。与网状或未经处理的碎石相比，在岩石和水泥的实验处理中发生的巩膜病招募明显增多；但是，大多数地块在2.5年后就破裂或被掩埋。为了解决这些问题，安装了较大尺寸的岩石桩。安装两年后，岩石上坚硬的珊瑚覆盖率不断增加；这种方法可能是一种实用的大规模康复技术。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号