Na Hang Nature Reserve, Tat Ke Sector - Frontier-publications.co.uk

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Na Hang Nature Reserve, Tat Ke Sector 1997 extremely important in terms of numbers of individuals. In particular, Collembola were an important group. At site PF2, the 'Others' group comprised 60% of the total individuals; 44% were Collembola. Pitfall trap samples resulted in large catches which were probably more representative of the terrestrial invertebrate communities in the sites studied than were the results of sweep-netting. Diversity index values for these sites were similar to those recorded for low-altitude forest sites in the Ban Bung sector (Hill and Kemp, 1996), although the sites chosen in Ban Bung were all primary forest vegetation, which might have been expected to support greater diversity than the secondary forest and open sites studied in the Tat Ke sector. However, as with the sweep-net samples, seasonal changes and altitude may influence this result. Frontier-Vietnam Environment Research Report 9 26
Na Hang Nature Reserve, Tat Ke Sector 1997 7.0 BUTTERFLIES (Lepidoptera, Papilionoidea) 7.1 Introduction There are no butterfly species listed in the Red Data Book for Vietnam (RDB, 1992), but this is due to a lack of sufficient data on butterfly abundances, rather than reflecting the rarity or otherwise of Vietnam's butterfly fauna (A. Monastyrskii, pers. comm.). Previously unknown butterfly species have recently been described from Vietnamese specimens (Devyatkin, 1996), and further new taxa are likely to exist, particularly among traditionally less well-known and highly diverse families such as the Hesperiidae and Lycaenidae (Lekagul et al., 1977). The work of the previous SEE expedition in Ban Bung in January-March 1996 was the first study of butterflies in the Na Hang region. However, for much of that period butterflies were scarce; both the number of butterfly individuals and the species diversity increased markedly during the study period, and were continuing to rise at the end of the period, suggesting that a continued study would have resulted in the recording of many more species (Hill and Kemp, 1996). The aim of the butterfly survey on this second expedition to the reserve was to add to the species list of the earlier study, to examine seasonal differences in abundance, as well as comparing habitats and their butterfly faunas in the two sectors of the reserve. 7.2 Methods Butterflies were collected throughout the Tat Ke sector, but particularly in habitats close to the base camp. Once collected, a preliminary identification of each specimen to genus and 'Recognisible Taxonomic Unit' (RTU) or morphospecies was made, using Lekagul et al (1977). Duplicate specimens were released; the aim was to take only one or two specimens of each species observed, although in the case of some highly variable common species (such as the grass yellows, Eurema spp.), many specimens were taken. Specimens were identified in Hanoi by A. Monastyrskii of the Russian Tropical Institute, using Corbet and Pendlebury (1978), Pinratana (1977-88), and other works; specimens of the family Hesperiidae were identified in Moscow by A. Devyatkin of Moscow State University. Frontier-Vietnam Environment Research Report 9 27
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Page 70 and 71: Appendix 1. Habitat; Plants Plant s
Page 72 and 73: Species Habitat Fertile Uses/Status
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stages SONNERATIACEAE 638. Duabanga
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Species Habitat Fertile Uses/Status
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FOREST TRANSECT 1 Key: Ac Ao Ar Cl
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FOREST TRANSECT 3 Key: Cl Clusiacea
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Appendix 3. Forest plot data
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Myrtaceae 4 1.081 3.60 8 1.250 4.66
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Nymphalidae 32. Cethosia biblis Dru
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Appendix 4b. Butterflies recorded a
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1 2 3 4 5 25 Opsarichthys uncirostr
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Appendix 6. Amphibians and Reptiles
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A B C Upupipae: Hoopoe 14. Hoopoe (
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A B C Subfamily Muscicapinae: Flyca
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7b. Formulation used for the assess
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Appendix 8. Key; A Identified from:
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Appendix 9. List of specimens Insec
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