Postdispersal fruit and seed removal by forest-dwelling rodents in a lowland rainforest in Mexico
Postdispersal fruit and seed removal by forest-dwelling rodents in a lowland rainforest in Mexico
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墨西哥低地雨林中森林啮齿动物传播后的果实和种子的清除
DOI：
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发表时间：
1998
影响因子：
1.4
通讯作者：
R. Martínez
中科院分区：
文献类型：
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作者：
V. Sánchez‐Cordero;R. Martínez
本研究探讨是否postdispensation水果和种子去除陆生哺乳动物常见的植物物种的项目，项目密度（低，中，高），和栖息地（间隙，中期演替，成熟）的类型的影响。在墨西哥的Los Tuxtlas雨林中测试了Brosimum braastrum和Ficus yoponensi（桑科）、Astrocaryum mexicanum（棕榈科）和Nectandra ambigens（樟科）的果实以及Omphalea oleifera（大戟科）和Cymbopetalum baillonii（番荔枝科）的种子。从108个实验斑块（N = 2340水果或种子的每种植物测试）5天后的项目去除较低的F。yoponensis（6.6%）比N. ambigens（68.8%），B.红腹锦鸡儿（67.8%）、C. baillonii（64.0%）和A. mexicanum（60.0%）。没有O.除去油茶。高密度食物斑块的果实或种子去除率高于低密度食物斑块。墨西哥C. baillonii和N.而在B中没有。nanostrum和F.约本。一个更高的水果或种子去除观察到在成熟的森林食物斑块比在所有测试的植物物种的差距。类似的去除值之间的开放（开放给所有陆生哺乳动物）和笼（开放给小啮齿动物）水果和种子补丁，丰富的啮齿动物活诱捕，和大型陆生哺乳动物的稀缺性，表明森林居住的小啮齿动物是主要的postdispersion去除剂。小啮齿类动物的食物选择导致的植物物种幼苗招聘的差异，可以部分地确定长期的森林植物区系组成在Los Tuxtlas雨林。
This study examined whether postdispersal fruit and seed removal by terrestrial mammals of common plant species was affected by the type of item, item density (low, medium, high), and habitat (gap, mid-succession, mature). Fruits of Brosimum alicastrum and Ficus yoponensi (Moraceae), Astrocaryum mexicanum (Palmae), and Nectandra ambigens (Lauraceae), and seeds of Omphalea oleifera (Euphorbiaceae) and Cymbopetalum baillonii (Annonaceae) were tested at the Los Tuxtlas rainforest in Mexico. Item removal from 108 experimental patches (N = 2340 fruits or seeds for each plant species tested) after 5 d was lower for F. yoponensis (6.6%) than for N. ambigens (68.8%), B. alicastrum (67.8%), C. baillonii (64.0%) and A. mexicanum (60.0%). No seeds of O. oleifera were removed. A higher fruit or seed removal was observed from high density than low density food patches in A. mexicanum, C. baillonii and N. ambigens, but not in B. alicastrum and F. yoponensis. A higher fruit or seed removal was observed from food patches in mature forest than in gaps in all plant species tested. Similar removal values between open (open to all terrestrial mammals) and caged (open to small rodents) fruit and seed patches, abundant rodent live-trapping, and a scarcity of large terrestrial mammals, indicated that forest-dwelling small rodents were the main postdispersal removal agents. Differences in plant species seedling recruitment resulting from small rodent food choices can partially determine long-term forest floristic composition at the Los Tuxtlas rainforest.