KEMELIMPAHAN BENTHIK INSEKTA DI HULU SUNGAI LERENG SELATAN MERAPI PASCA-ERUPSI 2010: Indikator Kesehatan Hutan Daerah Tangkapan Air
| Main Authors: | Djohan, Tjut Sugandawaty, Suhestiningsih, Krisni, Erif, La Ode Muhammad |
|---|---|
| Other Authors: | Hasse, J., Siregar, Ferry Muhammadsyah, Purwitorosari, Pradiastuti |
| Format: | BookSection PeerReviewed application/pdf |
| Bahasa: | eng |
| Terbitan: |
Sekolah Pascasarjana UGM
, 2012
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/32685/1/Merapi.pdf https://repository.ugm.ac.id/32685/ |
Daftar Isi:
- Pyroclastic flows and eruption of Mount Merapi 2010 burned out the forest upper headwaters of Kali Boyong and Kali Kuning. We assumed the forest fires caused the reducing of organic allochtnous input to the streams and changed the functional group of benthic insects of the headwaters. This research was study the abundance of the functional group of bentic insects in responding to the allochtonous input the streams post forest-fire due to the pyroclastic flows and eruption. Samples were collected using Surber Sampler of (30x30) cm2 at 5 cm sediment depth along 200m of the stream, which was divided into 5 segments of 20m of straight stream. At each segmnt, smaples were collected with 4 replicates. Results reveal that collector gathers Chironomous sp 99% dominated both streams. The sediment nutrients of NH4NO3, and PO4 were high. Shredder,Prionocera sp. was found only at Kali Boyong, and collector filter, Hydropsyche sp. was present only at Kali Kuning. Thus the forest fire of post pyroclastic flows and eruption of Mount Merapi 2010 changed the allochtonous input from coarce particulate organic matters (CPOM) to fine particulate organic matters (FPOM). This condition was responded by the functional group of benthic insect, which was changed their community of food cahain at both headwaters. The presence of feeding group collector gathers and collector filters of benthic insects indicated that the forest at the catchment areas of the soutern slope of Mount Merapi was disturbed. Key words: benthic insect, functional feeding group, forest fire, nutrient.