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Man as a Predator in the Intertidal Zone of Southern Chile

Carlos A. Moreno, John P. Sutherland and H. Fernando Jara
Oikos
Vol. 42, No. 2 (Jan., 1984), pp. 155-160
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3544787
Stable URL: http://www.jstor.org/stable/3544787
Page Count: 6
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Man as a Predator in the Intertidal Zone of Southern Chile
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Abstract

From 1978 to 1982, man was excluded from a 6000 m2 reserve near Mehuin, Chile (39°24′S, 73°13′W). During this time there was an increase in the abundance of Fissurella spp. coupled with a dramatic decline in the abundance of mid-intertidal macroalgae, principally Iridaea boryana. Macroalgal abundance increased to near 100% cover from 1978 to 1979 on a rock in the reserve where herbivores were removed. Outside the reserve, areas closest to large fishing villages had a higher cover of I. boryana and a lower abundance of F. picta. Mid-intertidal macroalgae are abundant only where human predation on herbivores is severe. /// С 1978 до 1982 гг человеческая деятелъностъ была исключена с заповеданной площади в 6000 M2 вблизи Мехина (Чили) - 39°24′ ю. ш., 73°13′ в.д. В течение этого периода наблюдалосъ увеличение обилия Fissurella spp. наряду с снижением обилия литоралъных многоклеточных водорослей, в основном, Iridaea boryana. Обилие многоклеточных водорослей увеличилосъ почти до 100% покрытия почвы с 1978 до 1979 гг на скалах в заповеднике, откуда были удалены фитофаги. Все заповедника участки, прилегаюшие к болъшим рыболовецим деревням, имеют болъшую площадъ покпытия I. boryana и менъшее обилие F. picta. Литоралъные водоросли обилъны шишъ там, где фитофаги силъно истребляютчя человеком.

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