對加利福尼亞灣的一項(xiàng)新研究得出結(jié)論說海岸紅樹林對于幼年水生生物的生存至關(guān)重要,，因此也對漁業(yè)的健康和漁民的經(jīng)濟(jì)福利至關(guān)重要。東太平洋海岸紅樹林的最北端在加利福尼亞灣,，紅樹林繁茂的根系鉆入海洋的潮汐區(qū)域,，成為了魚和蟹的苗床。然而,，近年來旅游勝地和蝦場侵入了紅樹林的領(lǐng)地,，砍伐掉樹木建立了海灘和池塘。
為了分析這些發(fā)展是否會(huì)破壞墨西哥的漁業(yè),，Octavio Aburto-Oropeza及其同事比較了加利福尼亞灣的13個(gè)區(qū)域的漁業(yè)產(chǎn)量,。這組科學(xué)家發(fā)現(xiàn)捕魚量與紅樹林海岸線的長度直接成比例，而獨(dú)立于其它變量,，例如緯度和河口尺寸,。在對紅樹林海岸線的貨幣價(jià)值進(jìn)行評估后，他們得出了每公頃每年價(jià)值37500美元的數(shù)字,，而總的長期價(jià)值是墨西哥政府所確定的價(jià)值的600多倍,。這組作者說，隨著世界漁業(yè)的衰退,，這一價(jià)值可能增加,。相關(guān)論文發(fā)表在美國《國家科學(xué)院院刊》（PNAS）上。（生物谷Bioon.com）
生物谷推薦原始出處：
PNAS,，doi: 10.1073/pnas.0804601105,，Octavio Aburto-Oropeza，Enric Sala
Mangroves in the Gulf of California increase fishery yields
Octavio Aburto-Oropeza*,†,‡, Exequiel Ezcurra§, Gustavo Danemann¶, Víctor Valdez¶, Jason Murray‖, and Enric Sala*,**
+Author Affiliations
*Center for Marine Biodiversity and Conservation, Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92093-0202;
†Departamento de Biología Marina, Universidad Autónoma de Baja California Sur, Carretera al Sur Km 5.5, La Paz, Baja California Sur, CP 23081, México;
§San Diego Natural History Museum, P.O. Box 121390, San Diego, CA 92112-1390;
¶Marine Conservation and Sustainable Fisheries Program, Pronatura Noroeste A.C., Calle Décima No. 60, Zona Centro, Ensenada, Baja California, CP 22800, México;
‖Department of Economics, Moore School of Business, University of South Carolina, Columbia, SC 29201; and
**Centre d'Estudis Avançats de Blanes, 17300 Blanes, Spain
Communicated by Rodolfo Dirzo, Stanford University, Stanford, CA, May 12, 2008 (received for review August 27, 2007)
Abstract
Mangroves are disappearing rapidly worldwide despite their well documented biodiversity and the ecosystem services they provide. Failure to link ecological processes and their societal benefits has favored highly destructive aquaculture and tourism developments that threaten mangroves and result in costly “externalities.” Specifically, the potentially irreparable damage to fisheries because of mangrove loss has been belittled and is greatly underestimated. Here, we show that, in the Gulf of California, fisheries landings are positively related to the local abundance of mangroves and, in particular, to the productive area in the mangrove–water fringe that is used as nursery and/or feeding grounds by many commercial species. Mangrove-related fish and crab species account for 32% of the small-scale fisheries landings in the region. The annual economic median value of these fisheries is US $37,500 per hectare of mangrove fringe, falling within the higher end of values previously calculated worldwide for all mangrove services together. The ten-year discounted value of one hectare of fringe is >300 times the official cost set by the Mexican government. The destruction of mangroves has a strong economic impact on local fishing communities and on food production in the region. Our valuation of the services provided by mangroves may prove useful in making appropriate decisions for a more efficient and sustainable use of wetlands.
