Update Artikelilmiah: 11705

RETNO DWI LESTARI

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Abstrak (Bhs. Indonesia)

Lereng timur Gunung Slamet merupakan salah satu kawasan hutan di Indonesia yang dipengaruhi oleh hutan hujan bagian barat dan hutan musim bagian timur Jawa. Beberapa hutan alam di daerah ini telah diubah menjadi hutan tanaman industri terutama pinus dan damar sejak bertahun-tahun yang lalu (1917). Karakteristik dari kanopi, fragmentasi hutan, dan iklim mikro dari lantai hutan telah berubah. Akibatnya, struktur komunitas, distribusi dan komposisi kelompok organisme mungkin telah berubah karena adanya perubahan iklim mikro habitat serangga tanah termasuk kumbang (Coleoptera). Tujuan dari penelitian ini adalah untuk mengetahui keragaman kumbang (Coleoptera) di lantai hutan pinus dan damar hutan lereng timur Gunung Slamet, Desa Serang, Karangreja, Kabupaten Purbalingga. Penelitian ini dilakukan selama bulan Februari hingga Mei 2014, dengan menggunakan metode survei dengan teknik pengambilan sampel purposive random sampling (kuadran) sepanjang garis transek. Setiap baris terdiri dari lima kuadran diletakkan alat perangkap secara acak. Variabel yang diteliti adalah keragaman spesies dan parameter meliputi jumlah familia dan spesies Coleoptera. Parameter tambahan meliputi pH, kelembaban dan tekstur tanah. Sampel diidentifikasi di Laboratorium Entomologi, Fakultas Biologi, Universitas Jenderal Soedirman Purwokerto. Data dianalisis dengan menggunakan indeks Shannon-Wiener. Hasil penelitian menunjukkan bahwa ditemukan total individu dari hutan pinus dan hutan damar sebanyak 112 individu dari ordo Coleoptera yang terdiri dari 4 familia yaitu Nitidulidae sebanyak 13 individu, Laemophloeidae sebanyak 3 individu, hydrophilidae sebanyak 7 individu dan Scarabidae sebanyak 89 individu. Dari hutan damar, ditemukan sebanyak 96 individu sebanyak 4 spesies . Jumlah ini lebih besar dibandingkan dengan hutan pinus di mana diperoleh hanya 16 individu sebanyak 3 spesies. Indeks keanekaragaman Shannon-Wiener hutan damar adalah 3,295 (sedang) dan hutan pinus adalah 0,463 (rendah). Perbedaan indeks keanekaragaman Coleoptera dikarenakan adanya perbedaan kelembaban dan intensitas cahaya yang terkait dengan tingkat dekomposisi humus.

Abtrak (Bhs. Inggris)

SUMMARY
The eastern slope of Mount Slamet is one of the Indonesian rain forest area that is influenced by the wet rainforest of the western part and the monsoon forest  of the eastern part of  Java.  Some natural forests in this area have been converted into industrial forest especially pine and dammar since many years ago (1917).  Consequently, the chracteristics of the canopies, forest fragmentation, and the microclimate of the forest floor have been altered. As a result, the community structure, distribution and the composition of organismal groups may have changed due to the changes in microclimate of the habitat of soil insects including beetles (Coleoptera). The aim of this research is to investigate the diversity of beetles (Coleoptera) on the forest floor of the pine and dammar forests of the eastern slope of Mount Slamet, Serang village, Karangreja District, Purbalingga Regency. This research was conducted during the months of February until May 2014, using a survey method with a purposive random sampling technique along transect lines.  Each line was consisted of five quadrants where pitfall traps were randomly placed.  The variable studied was the species diversity and the parameters were the numbers of families and species of Coleoptera.  The additional parameters were pH, humidity and the soil texture.  The samples were indentified in the Laboratory of Entomology, Faculty of Biology, Jenderal Soedirman University Purwokerto.  The data were analysed by using Shannon-Wienner Index.  The results showed that there were found from both pine and dammar forests the total of 112 individuals of Coleopteran families consisted of 4 Nitidulidae that as many as 13 individuals, Laemophloeidae as much as 3 individuals, hydrophilidae much as 7 imdividuals and Scarabidae as many as 89 individuals.  From the dammar forest, 96 individuals were found consisted of 4 species.  These number were greater than that of the pine forests where there were obtained 16 individuals consisting of 3 species.  Diversity index Shannon-Wienner  of dammar forest was 3.295 (high) and of pine forest was 0.463 (low).  This difference of diversity index of Coleoptera may be due to the difference in humidity and light intensity associated with the decomposition rate of the humus.

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