Endozoochorous seed dispersal by sympatric mustelids, Martes melampus and Mustela itatsi, in western Tokyo, central Japan
Tóm tắt
We investigated seed dispersal by two sympatric mustelid species, the Japanese marten (Martes melampus) and Japanese weasel (Mustela itatsi), along an intercity forest path in western Tokyo, central Japan, from Jul 2007 to Jul 2008. We aimed to investigate the effect of food/habitat preference of these mustelids (martens are semi-arboreal frugivores while weasels are terrestrial carnivores) on their seed dispersal characteristics, which determine their efficacy as seed dispersers. In total, we analyzed 478 fecal samples collected from the two mustelids (Nmarten = 381, Nweasel = 97). The proportions of feces containing seeds for martens and weasels were 81.4% and 55.7%, respectively. The number of plant species whose seeds were found within the feces were 28 and 17, respectively. Almost all seeds within feces of both mustelids were intact. The number of plant species whose seeds were found within a single fecal sample ranged from one to four, but no significant difference was detected between the two mustelids. However, marten feces contained a significantly greater number of seeds of most plant species as well as total number of seeds than did weasel feces. The numbers of plant species and seeds represented in marten feces varied seasonally, but those represented in weasel feces did not. Our findings suggest the possibility that both mustelids act in some ways as seed dispersers, although martens seem to disperse a greater diversity and total amount of seeds.
Tài liệu tham khảo
Arai, S., Adachi, T., Kuwahara, Y., Yoshida, K., 2003. Food habit of Japanese marten (Martes melampus) at Kuju Highland in Kyushu, Japan. Mammalian Science 43: 19–28 (In Japanese with English summary).
Begon, M., Harper, J.L., Townsend, C.R., 1996. Ecology, 3rd ed. Blackwell Science, Oxford.
Buskirk, S.E., Harestad, A.S., Raphael, M.G., Powell, R.A., 1994. Martens, Sables and Fishers: Biology and Conservation. Cornell University Press, Ithaca.
Feldhamer, G.A., Drickamer, L.C., Vessey, S.H., Merritt, J.F., 2003. Mammalogy: Adaptation, Diversity and Ecology, 2nd ed. McGraw-Hill, Boston.
Fujii, T., Maruyama, N., Kanzaki, N., 1998. Seasonal changes in food habits of Japanese weasel in a middle stream of the Tamagawa River. Mammalian Science 38, 1–8 (in Japanese with English summary).
Fukui, A., 1996. Retention time of seeds in bird guts: costs and benefits for fruiting plants and frugivorous birds. Plant Species Biology 11, 141–147.
Herrera, C.M., 1984. A study of avian frugivores, bird-dispersed plants, and their interaction in Mediterranean scrublands. Ecological Monographs 54, 1–23.
Herrera, C.M., 1989. Frugivory and seed dispersal by carnivorous mammals, and associated fruit characteristics, in undisturbed Mediterranean habitats. Oikos 55, 250–262.
Hickey, J.R., Flynn, R.W., Buskirk, S.W., Gerow, K.G., Wilson, M.F., 1999. An evolution of a mammalian predator. Martes americana, as a disperser of seeds. Oikos 87, 499–508.
Kaneko, Y., Shibuya, M., Yamaguchi, N., Fujii, T., Okumura, T., Matsubayashi, K., Hioki, Y., 2009. Diet of Japanese weasels (Mustela itatsi) in a sub-urban landscape: implications for year-round persistence of local populations. Mammal Study 34, 97–106.
Kawauchi, N., Yamamoto, Y., Imai, K., 2003. Annual changes in testicular plasma testosterone concentration, home range and active time in wild male marten, Martes melampus melampus. Mammalian Science 43, 93–98 (in Japanese with English summary).
Koike, S., Masaki, T., 2008. Frugivory of carnivora in central and southern parts of Japan analyzed by literature. Journal of Japan Forestry Society 90, 26–35 (in Japanese with English summary).
Koike, S., Morimoto, H., Goto, Y., Kozakai, C., Yamazaki, K., 2008. Frugivory of carnivores and seed dispersal of fleshy fruits in cool-temperate deciduous forests. Journal of Forest Research 15, 215–222.
Kusui, H., Kusui, Y., 1998. Food habits of the Japanese marten Martes melampus (Wagner, 1840) in Mt. Yamato-Katsuragi (2) studies of year to year variation. Wildlife in Kii Peninsula 4, 13–19 (in Japanese).
Nakamura, T., Kanzaki, N., Maruyama, N., 2001. Seasonal changes in food habits of Japanese martens in Hinode-cho and Akiruno-shi, Tokyo. Wildlife Conservation Japan 6, 15–24 (in Japanese with English summary).
Nakayama, S., Inokuchi, M., Minamitani, T., 2000. Encyclopedia of Plant Seeds of Japan. Tohoku University Press, Sendai (in Japanese).
Ohdachi, S.D., Ishibashi, Y., Iwasa, M.A., Saitoh, T. (Eds.), 2009. The Wild Mammals of Japan. Shoukadoh, Tokyo.
Otani, T., 2002. Seed dispersal by Japanese marten Martes melampus in the subalpine shrubland of northern Japan. Ecological Research 17, 29–38.
Pollux, B.J.A., Ouborg, N.J., van Groenendael, J.M., Klaassen, M., 2007. Consequences of intraspecific seed-size variation in Sparganium emersum for dispersal by fish. Functional Ecology 21, 1084–1091.
R Development Core Team, 2009. R: A Language and Environment for Statistical Computing, Version 2.9.1. R Foundation for Statistical Computing, Vienna.
Rosalino, L.M., Santos-Reis, M., 2009. Fruit consumption by carnivores in Mediterranean Europe. Mammal Review 39, 67–78.
Rosalino, L.M., Rosa, S., Santos-Reis, M., 2010. The role of carnivores as Mediterranean seed dispersers. Annales Zoologici Fennici 47, 195–205.
Sasaki, H., Ono, Y., 1994. Habitat use and selection of the Siberian weasel Mustela sibirica coreana during the non-mating season. Journal of Mammalogical Society of Japan 19, 21–32.
Sekiguchi, K., Ogura, G., Sasaki, T., Nagayama, Y., Tsuha, K., Kawashima, Y., 2002. Food habits of introduced Japanese weasels (Mustela itatsi) and impacts on native species on Zamami Island. Mammalian Science 42, 153–160 (in Japanese with English summary).
Tatara, M., Doi, T., 1994. Comparative analyses on food habits of Japanese marten, Siberian weasel and leopard cat in the Tsushima islands. Japan. Ecological Research 9, 99–107.
Tsuji, Y., Uesugi, T., Shiraishi, T., Miura, S., Yamamoto, Y., Kanda, E., Faecal size criteria to discriminate Japanese marten (Martes melampus) and Japanese weasel (Mustela itatsi). Journal of Zoo and Aquarium (in Japanese with English summary), in press.
Wilson, M.F., 1993. Mammals as seed dispersal mutualists in North America. Oikos 67, 159–176.
Yasuma, S., 1985. Animal Watching: Wild Mammals of Japan. Shobunsha, Tokyo (in Japanese).
Yukawa, H., 1968. On the food habit of the Japanese weasel (Mustela sibirica itatsi Temminck) in northern parts of Hiroshima Pref. Hiwa Science Museum Report 12, 7–10 (in Japanese).
Zhou, Y., Slade, E., Newman, C., Wang, X., Zhang, S., 2008. Frugivory and seed dispersal by the yellow-throated marten Martes, flavigula, in a subtropical forest of China. Journal of Tropical Ecology 24, 219–223.