Christie P, White A, Deguit E
School of Marine Affairs, University of Washington, 3707 Brooklyn Ave. NE, Seattle, WA 98105-6715, USA.
J Environ Manage. 2002 Dec;66(4):441-54. doi: 10.1006/jema.2002.0595.
In 1985, in response to declining coral reef conditions, local residents and officials established small, no-take marine sanctuaries on Balicasag and Pamilacan Islands through a community-based process. The implementation of marine protected areas (MPAs) on Balicasag and Pamilacan Islands has been a partial success. As a direct result of protection, living hard coral cover has increased by 119% in Balicasag's sanctuary and by 67% in the non-sanctuary during the period 1984 to 1999, but Balicasag's reef is increasingly affected by breakage from anchors from dive boats and Crown-of-thorns starfish infestations. During the same period, living hard coral cover decreased by 20% in Pamilacan's sanctuary and by 45% in the non-sanctuary from 1984 to 1999. The decrease in living hard coral cover in Pamilacan's sanctuary is most likely a result of the 1998 bleaching event, Crown-of-thorn starfish and possible storm damage. Although there was an initial increase in the economically important target fish abundance in the Balicasag sanctuary and non-sanctuary and in the Pamilacan sanctuary during the first two years of implementation in the mid-1980s, there has since been a significant decline. Mean target fish abundance for the Balicasag non-sanctuary at 230 (+/- 65) individuals per 500 m2 is not significantly different from control sites without MPAs on nearby Panglao and Cabilao Islands at 164 (+/- 67) individuals per 500 m2. In general, fish abundance and diversity inside and outside the sanctuaries peaked in 1986, a year after the establishment of the sanctuaries when enforcement was strictest. Therefore, despite considerable success in enforcing regulations associated with these small MPAs at Balicasag and Pamilacan Islands, a trend of declining fish abundance and species richness among economically valuable species immediately outside the no-take areas highlights the limitations of small and isolated MPAs. This study contributes to the growing sentiment that it is not realistic for scattered, small no-take areas to maintain fish abundance and diversity on surrounding reefs when intensive fishing effort immediately adjacent to no-take areas removes most fish that exit these areas. This finding emphasizes the importance of nesting individual MPAs within broader management regimes that lead to overall fishing effort reduction and networking of MPAs. Among other recommendations, the authors advocate for continued support for community-based MPAs, a network of MPAs, reduced fishing effort in areas surrounding the MPAs and other management measures to improve the quality of the coral reef habitats.
1985年,为应对珊瑚礁状况的恶化,当地居民和官员通过社区主导的程序,在巴里卡萨岛和帕米拉坎岛设立了小型禁捕海洋保护区。巴里卡萨岛和帕米拉坎岛海洋保护区的实施取得了部分成功。由于保护措施的直接影响,在1984年至1999年期间,巴里卡萨岛保护区内活硬珊瑚覆盖率增长了119%,非保护区增长了67%,但巴里卡萨岛的珊瑚礁越来越受到来自潜水船锚的破坏以及棘冠海星侵扰的影响。在同一时期,帕米拉坎岛保护区内活硬珊瑚覆盖率从1984年至1999年下降了20%,非保护区下降了45%。帕米拉坎岛保护区内活硬珊瑚覆盖率下降很可能是1998年白化事件、棘冠海星以及可能的风暴破坏造成的。尽管在20世纪80年代中期实施的头两年,巴里卡萨岛保护区、非保护区以及帕米拉坎岛保护区内具有经济重要性的目标鱼类数量最初有所增加,但此后出现了显著下降。巴里卡萨岛非保护区每500平方米的目标鱼类平均数量为230(±65)条,与附近邦劳岛和卡比劳岛未设海洋保护区的对照地点每500平方米164(±67)条的数量没有显著差异。总体而言,保护区内外的鱼类数量和多样性在1986年达到峰值,即保护区设立一年后,当时执法最为严格。因此,尽管在执行与巴里卡萨岛和帕米拉坎岛这些小型海洋保护区相关的规定方面取得了相当大的成功,但禁捕区外具有经济价值物种的鱼类数量和物种丰富度呈下降趋势,凸显了小型孤立海洋保护区的局限性。这项研究促使人们越来越强烈地认为,当紧邻禁捕区的高强度捕捞活动捕捞出大多数离开这些区域的鱼类时,分散的小型禁捕区要维持周边珊瑚礁的鱼类数量和多样性是不现实的。这一发现强调了将单个海洋保护区纳入更广泛管理制度的重要性,这种制度会导致总体捕捞努力减少以及海洋保护区网络化。在其他建议中,作者主张继续支持基于社区的海洋保护区、海洋保护区网络、减少海洋保护区周边区域的捕捞努力以及采取其他管理措施来改善珊瑚礁栖息地的质量。