Resource partitioning between Microlophus occipitalis and Stenocercus puyango (Sauria: Tropiduridae) in Cerros de Amotape National Park, Tumbes, Peru

IF 0.5 Q4 BIOLOGY

Revista Peruana de Biologia Pub Date : 2021-08-31 DOI:10.15381/rpb.v28i3.21115

Alfredo Guzmán, J. Jordán

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Abstract

Activity, microhabitat use, and diet are patterns commonly used to define the saurian community structure, because of differential exploitation allowing coexistence at the same time and place. We analyze resource partitioning between two sympatric saurian species, Stenocercus puyango and Microlophus occipitalis, in the transitional area of the Pacific Tropical Forest and the Dry Forest inside Cerros de Amotape National Park (PNCA) in Tumbes, northwestern of Peru. Microlophus occipitalis and S. puyango both showed a unimodal activity pattern with higher activity around 13:00 h, with a mean body temperature of 34.83 °C and 32.17 °C respectively, observing a significant relationship between body and environmental (air and substrate) temperatures. Rocks and tree trunks were the most frequent microhabitats used by M. occipitalis while S. puyango were registered more frequently over leaf litter. The diets of both tropidurids were composed by arthropods, ants, and insect larvae mainly. Similarities in activity times (temporal niche) and diet (trophic niche) should be related to phylogenetic relationship and environmental characteristics of PNCA (seasonality, vegetal composition) meanwhile differences in space use and microhabitat thermal quality will be related to thermal quality in the area.

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秘鲁塞罗斯·德·阿莫特普国家公园枕小象与扁尾绦虫的资源分配

活动、微栖息地的使用和饮食是通常用来定义蜥类群落结构的模式，因为不同的开发允许在同一时间和地点共存。我们分析了秘鲁西北部图姆斯的Cerros de Amotape国家公园（PNCA）内太平洋热带森林和干燥森林过渡区的两个同域龙类物种，puyango Stenocercus和occipitalis Microlophus之间的资源分配。Microlophus occipitalis和S.puyango在13:00左右均表现出单峰活动模式，活动较高，平均体温分别为34.83°C和32.17°C，观察到身体与环境（空气和基质）温度之间存在显著关系。岩石和树干是M.occipitalis使用最频繁的微生境，而S.puyango则比落叶更频繁。两种热带豆的日粮主要由节肢动物、蚂蚁和昆虫幼虫组成。活动时间（时间生态位）和饮食（营养生态位）的相似性应与PNCA的系统发育关系和环境特征（季节性、植物组成）有关，而空间利用和微生境热质量的差异将与该地区的热质量有关。

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来源期刊

Revista Peruana de Biologia Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)

CiteScore

1.30

自引率

20.00%

发文量

审稿时长

16 weeks

期刊介绍： The REVISTA PERUANA DE BIOLOGIA is a peer reviewed scientific journal, published by Instituto de Investigaciones de Ciencias Biológicas Antonio Raimondi, Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Lima, Perú. It is publish on line and printed form in February, May, August, November. The REVISTA PERUANA DE BIOLOGIA publishes original research articles of outstanding scientific significance and relevance on topics of biodiversity, biotechnology, ecology, environmental management and biomedicine. The works may be submitted in English or Spanish. The articles will be reviewed by referees according to international standards of quality, creativity, originality and contribution to knowledge.