Download Rice Field Ecology in Northeastern Thailand: The Effect of by Charles W. Heckman PDF
By Charles W. Heckman
Research was once performed in Udorn Thani starting in September, 1975, with a view to elucidate the consequences of seasonal adjustments at the aquatic group of a rice box. actual and chemical adjustments that ensue through the process a yr have been recorded and relating to the constitution and job of the aquatic organic com munity. A rice box was once chosen that's ordinary of the numerous habitats of this type which are present in Northeastern Thailand (Fig. 1). For quite a few purposes those habitats and their place are of unique curiosity (Fig. 2). determine 1. The rice box investigated, north of the province capital, Udorn Thani, Thailand. Northeastern Thailand and a small a part of Laos include the center Mekong Valley. Its geographic scenario and weather conditions set this zone aside as a dis tinct sub-region of Southeast Asia. it truly is unlucky that enough organic learn has no longer but been conducted to delimit the SUb-regions based on their fauna and plant life and to totally describe a few of the ecosystems that ensue in them. the center Mekong Valley is without doubt one of the such a lot overlooked parts of the zone, and there's no finished literature on its biota. little or no ecological info is accessible on a number of the species that abound there.
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Extra resources for Rice Field Ecology in Northeastern Thailand: The Effect of Wet and Dry Seasons on a Cultivated Aquatic Ecosystem
Example text
The breakdown of the dead plant material is expedited by the animals that consume it. Besides purely aquatic species, several terrestrial ones also perform this 26 service. One of the most important is the domestic water buffalo, Bubalus bubalus L. The rice chaff and aquatic grasses are eaten by the buffaloes, which are turned loose in the rice fields after the harvest (Fig. 24). Their faecal matter returns large Figure 24. Water buffaloes are released in the rice fields after the harvest to graze on the stubble.
Sp. lquatic habitat A+ - High population density W - Inhabiting mud or moist decaying plant material S - Sexual reproduction or spore formation X - Not observed 47 Table 3. Rice field fauna. Rainy Season* II Cnidaria - Hydrozoa Hydridae Hydra sp. Platyhelminthes-Turbellaria Catenulida Catenulidae Catenula sp. Stenostomidae ? Stenostomum sp. Rhynchoscolex cf. simplex Leidy Platyhelminthes - Turbellaria - Neorhabdocoela Typhloplanidae ? Strollgylostoma sp. Phaellocora sp. Castrella sp. Platyhelminthes - Trematoda ?
A A ? ? X X X A A X X X A A A A AB AB A AB X X X X A A A X X A X X X X X A 49 Table 3 cant. ) corn uta corn uta (0. F. ) f. grandis (nov. : pers. comm. W. ) Lacinularia elliptica Shephard Philodinidae Philodina sp. 1 Philodina sp. 2 Rotaria sp. Unident. sp. Gastrotricha Chaetonotidae lchthydium cf. podura (0. F. Miiller) lchthydium sp. gastrocyaneus Brunson Chaetonotus sp. 1 Chaetonotus sp. 2 Lepidodermella sp. Polymerurus cf. rhomboides (Stokes) 50 Dry Seasons** II III IV V VI A A A X X X X R X X X X A A A A A A X A X X X X X X X X A X A A A A A A A A A X X X X X R X X X A A A X A A X A X X X X A X X X X X X A A X X X X X A X X X A A X X X X A+B AB AB X X A+B A X X A A A A A X X A X X A A A X A X A X X A R A X A A X A X A X X X R R A X A X X A X X X X X X A X A A X A X X X X X X X A A X X Table 3 cont.