Differential endozoochory of aquatic invertebrates by two duck species in shallow lakes |
| |
| Institution: | 1. Programa de Pós-Graduação em Biologia de Fungos, Universidade Federal de Pernambuco, Av. da Engenharia, s/n, Cidade Universitária, CEP 50740-600, Recife, PE, Brazil;2. Laboratório de Microbiologia, Universidade Federal do Vale do São Francisco, Campus de Ciências Agrárias, Rodovia BR 407, Km 12, Lote 543, Projeto de Irrigação Nilo Coelho, s/n, ‘‘C1’’, Petrolina, PE CEP 56300-990, Brazil;3. Embrapa Milho e Sorgo, Núcleo de Biologia Aplicada, Rod. MG 424 KM 45 - Bairro Esmeraldas, SN, Caixa Postal 285, CEP 35701-970, Sete Lagoas, MG, Brazil;4. Agroscope, Ecotoxicology, Schloss 1, CH-8820 Wädenswil, Switzerland;1. Estación Forestal INTA-Villa Dolores (EEA Manfredi - Instituto Nacional de Tecnología Agropecuaria), Camino Viejo a San José km 1, (5870) Villa Dolores, Pcia, Córdoba, Argentina;2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina;1. Department of Botany and Zoology, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czechia;2. Department of Vegetation Ecology, Institute of Botany, The Czech Academy of Sciences, Lidická 25/27, CZ-657 20 Brno, Czechia;3. Institute of Ecology and Evolutionary Biology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., 10617 Taipei, Taiwan;4. School of Forestry and Resource Conservation, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., 10617 Taipei, Taiwan;1. Department of Plant Protection, Gaziosmanpaşa University, Tokat, Turkey;2. Department of Soil Science and Plant Nutrition, Gaziosmanpaşa University, Tokat, Turkey;3. Department of Plant Protection, Dicle University, Diyarbakir, Turkey |
| |
| Abstract: | Animal vectors are essential for the movement of invertebrate resting eggs between water bodies. However, differences in habitat preferences and feeding behaviour between bird species may result in variations in the dispersal of invertebrates via these birds, even if the different bird species live in the same lake. To test such effects, faecal samples from Anas platyrhynchos (collected in autumn and spring) and Tadorna tadorna (collected in spring) were cultured in water at 20° C and 12 L: 12 D conditions in order to quantify the resting eggs which could be internally transported by these birds. One half of each faecal sample was initially cultured at a conductivity of 0.6 mS cm−1 and the other half at 6 mS cm−1. 1054 invertebrates hatched from a total of 60 faecal samples, including cladocerans, copepods, ostracods, rotifers and ciliates, with a wide variability among faeces. Autumn yielded a low proportion of samples with hatchlings (12.5%) compared to spring (90%). Significant differences were observed between birds, but not between conductivity treatments. Thus, our results imply different hatching dynamics affected by disperser and season, but most species transported as resting eggs by birds seem to have a wide tolerance to hatch under variable salinity conditions. These differences may largery influence the metacommunity dynamics of lake networks, and could be a key factor to consider in wetland conservation planning. |
| |
| Keywords: | Aquatic invertebrates Waterfowl Dispersal Hatching dynamics Shallow lakes |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
