Abstract - Harapan forest is a tropical rain forest located at between of Jambi and South Sumatera Province, about 46 385 hectare of Harapan Forest is located in Province of Jambi. About 42% of the forest was converted to rubber jungle, rubber and oil palm plantation. Each landuse has different characteristic to affect the diversity and abundance of collembola. The diversity and abundance of collembola has important roles in ecosystem. The roles are as decomposer, nutrient redistribution, biological control, and prey.
Collembola are not the main prey naturally to predator ants. However, when the activity and space of predator ants was restricted, abundant collembola was turned to be prey or alternative feed for predator ants. Indirectly, collembola were balancing the ecosystem because it was affected the ants population. The aims of this research is (1) to determine the diversity and abundance of collembola in secondary forest, rubber jungle, rubber and oil palm plantation, and (2) to determine the impact of activity and space restriction of predator ants to the diversity and abundance of collembola.
Soil sampling was conducted in four landuse types. Each landuse has four plots of 50x50 m in wide and each plot has six subplots (three control subplots and three treatment subplots) of 1x2 m in wide. In total there were 96 (4 x 4 x 6) soil sampling points. Control subplots were restricted with perforated aluminum fence, while treatment subplots were restricted with glued aluminum fence by glue trap. Soil samples were taken with shovel of 16x16 in wide and 5 cm in depth. Soil samples were extracted with Kempson Extractor for seven days. Extracted collembola was stored in collection tube contained alcohol 96% and it was identified up to level of genus. Collembola data was analyzed for the total, diversity, and dominancy.
There are 4 orders, 14 families, and 31 genera were found in four landuses. Two dominated genera were Isotomiella and Proisotoma which was included in family of Isotomidae. Diversity and dominancy index of collembola in four landuse both control and treatment subplots were moderate to high. Glue trap application significantly decreased the diversity and abundance of collembola. The glue trap caused many collembola turned to be the prey of predator ants. Furthermore, the competition was occurred between collembola in getting food because reduction of food availability.
The diversity and abundance of collembola was affected by environmental factors i.e. the amount of litter, C-total, N-total, and rainfall. The amount of litter was related to C and N contents which have been produced in decomposition process. Those can be used by collembola as food source. Rainfall was related with the suitable condition for collembola. Collembola like moist condition, if the weather is dry, collembola will move to a suitable condition, that is in the deeper soil layers.
Landuse changes from forest to plantation was not always have a negative impact on collembola. It was relates to the management of plantation were structured so that the environmental conditions for collembola actually almost the same as in the forest. However, trap application (fence and glue) caused the decrease of total and diversity in both family and genus of Collembola because latitude restriction. It caused predator ants preying collembola in large quantities. The genera of Papirioides, Pseudosinella, Lepidosira and Bromachantus did not occure in the glue traps subplot at four landuse types.
Collembola are not the main prey naturally to predator ants. However, when the activity and space of predator ants was restricted, abundant collembola was turned to be prey or alternative feed for predator ants. Indirectly, collembola were balancing the ecosystem because it was affected the ants population. The aims of this research is (1) to determine the diversity and abundance of collembola in secondary forest, rubber jungle, rubber and oil palm plantation, and (2) to determine the impact of activity and space restriction of predator ants to the diversity and abundance of collembola.
Soil sampling was conducted in four landuse types. Each landuse has four plots of 50x50 m in wide and each plot has six subplots (three control subplots and three treatment subplots) of 1x2 m in wide. In total there were 96 (4 x 4 x 6) soil sampling points. Control subplots were restricted with perforated aluminum fence, while treatment subplots were restricted with glued aluminum fence by glue trap. Soil samples were taken with shovel of 16x16 in wide and 5 cm in depth. Soil samples were extracted with Kempson Extractor for seven days. Extracted collembola was stored in collection tube contained alcohol 96% and it was identified up to level of genus. Collembola data was analyzed for the total, diversity, and dominancy.
There are 4 orders, 14 families, and 31 genera were found in four landuses. Two dominated genera were Isotomiella and Proisotoma which was included in family of Isotomidae. Diversity and dominancy index of collembola in four landuse both control and treatment subplots were moderate to high. Glue trap application significantly decreased the diversity and abundance of collembola. The glue trap caused many collembola turned to be the prey of predator ants. Furthermore, the competition was occurred between collembola in getting food because reduction of food availability.
The diversity and abundance of collembola was affected by environmental factors i.e. the amount of litter, C-total, N-total, and rainfall. The amount of litter was related to C and N contents which have been produced in decomposition process. Those can be used by collembola as food source. Rainfall was related with the suitable condition for collembola. Collembola like moist condition, if the weather is dry, collembola will move to a suitable condition, that is in the deeper soil layers.
Landuse changes from forest to plantation was not always have a negative impact on collembola. It was relates to the management of plantation were structured so that the environmental conditions for collembola actually almost the same as in the forest. However, trap application (fence and glue) caused the decrease of total and diversity in both family and genus of Collembola because latitude restriction. It caused predator ants preying collembola in large quantities. The genera of Papirioides, Pseudosinella, Lepidosira and Bromachantus did not occure in the glue traps subplot at four landuse types.
0 Response to "The Abundance and Diversity of Collembola at Four Landuse Types in Harapan Forest Landscape, Jambi"
Posting Komentar