当前位置: X-MOL 学术Mamm. Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Decreasing dietary diversity following habitat loss: the case of the thin-spined porcupine in the Atlantic forest
Mammalian Biology ( IF 1.9 ) Pub Date : 2020-07-09 , DOI: 10.1007/s42991-020-00051-9
Gastón Andrés Fernandez Giné , Kena Ferrari Moreira da Silva , Deborah Faria

The thin-spined porcupine ( Chaetomys subspinosus Olfers, 1818) is an endemic and threatened rodent from the Atlantic Forest biological hotspot. Previous studies have demonstrated it follows a strictly leaf-based diet, limited to a few tree species, although such information is derived from few individuals ( n = 7) resident in small forest fragments. We aimed to evaluate whether such dietary specialization persists when animals inhabit larger forest fragments. For this, we assessed the diet composition of 19 radiotracked individuals inhabiting small (< 50 ha; n = 10) and large (> 500 ha; n = 9) forest fragments in southern Bahia state. We compared the composition and diversity of the diet in terms of tree parts and species consumed in these contrasting fragment size environments. Secondly, we aimed to evaluate the influence of leaf chemical composition on the consumption of plant species. Our findings show that the thin-spined porcupine is a strict folivore, with individuals responding to the reduction in forest size by reducing the diversity of plant species consumed, but not by feeding on new plant parts. Although the diet was richer in larger forest fragments, certain tree species were the most consumed in both fragment-size categories and the unique item consumed were leaves. Fiber influenced positively the leaf consumption of the plant species, while there was no effect of other chemical characteristics. The influence of the habitat size reduction on food diversity may be a risk factor for the species.

中文翻译:

栖息地丧失后饮食多样性下降:以大西洋森林中的细刺豪猪为例

细刺豪猪 ( Chaetomys subspinosus Olfers, 1818) 是一种来自大西洋森林生物热点的地方性和受威胁的啮齿动物。先前的研究表明,它严格遵循以叶为基础的饮食,仅限于少数树种,尽管此类信息来自居住在小森林碎片中的少数个体 (n = 7)。我们旨在评估当动物居住在较大的森林碎片中时这种饮食专业化是否持续存在。为此,我们评估了居住在巴伊亚州南部的小型(< 50 公顷;n = 10)和大型(> 500 公顷;n = 9)森林碎片的 19 名放射追踪个体的饮食组成。我们根据这些不同的碎片大小环境中消耗的树木部分和物种,比较了饮食的组成和多样性。第二,我们旨在评估叶片化学成分对植物物种消耗的影响。我们的研究结果表明,细刺豪猪是一种严格的食叶动物,个体通过减少消耗的植物物种多样性来应对森林面积的减少,但不会以新的植物部分为食。虽然饮食中较大的森林碎片更丰富,但某些树种在两个碎片大小类别中消耗最多,并且消耗的独特物品是树叶。纤维对植物物种的叶片消耗有积极影响,而其他化学特性没有影响。栖息地面积减少对食物多样性的影响可能是该物种的一个风险因素。个体通过减少消耗的植物物种的多样性来应对森林面积的减少,而不是通过以新的植物部分为食。虽然饮食中较大的森林碎片更丰富,但某些树种在两个碎片大小类别中消耗最多,并且消耗的独特物品是树叶。纤维对植物物种的叶片消耗有积极影响,而其他化学特性没有影响。栖息地面积减少对食物多样性的影响可能是该物种的一个风险因素。个体通过减少消耗的植物物种的多样性来应对森林面积的减少,而不是通过以新的植物部分为食。虽然饮食中较大的森林碎片更丰富,但某些树种在两个碎片大小类别中消耗最多,并且消耗的独特物品是树叶。纤维对植物物种的叶片消耗有积极影响,而其他化学特性没有影响。栖息地面积减少对食物多样性的影响可能是该物种的一个风险因素。某些树种在两个碎片大小类别中消耗最多,消耗的独特物品是树叶。纤维对植物物种的叶片消耗有积极影响,而其他化学特性没有影响。栖息地面积减少对食物多样性的影响可能是该物种的一个风险因素。某些树种在两个碎片大小类别中消耗最多,消耗的独特物品是树叶。纤维对植物物种的叶片消耗有积极影响,而其他化学特性没有影响。栖息地面积减少对食物多样性的影响可能是该物种的一个风险因素。
更新日期:2020-07-09
down
wechat
bug