2013 Fiscal Year Final Research Report
Development for irrigation system to conserve the dragonfly dwelling rice paddy field under climate change
| Project/Area Number |
22580278
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Irrigation, drainage and rural engineering/Rural planning
|
|---|
| Research Institution | Miyagi University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2010-04-01 – 2014-03-31
|
| Keywords | アカネ属 / 中干し / 栽培管理 / ライシメータ / 生存率 / 発育ゼロ点 / 有効積算温量 |
|---|
| Research Abstract |
Dragonflies occurring in rice fields, like all other freshwater macroinvertebrates of rice fields, require certain life cycle traits to cope with or circumvent the temporary nature of their habitats. Dragonfly larvae may survive long periods of drought burrowed in wet soil or hidden in wet detritus; drought survival in egg stage is common in species of Lestes and others. However, avoiding drought by spending the dry period as adults may be the most common habit in the Odonata of temporary waters, particularly in the tropics (Suhling et al. 2014/in press). This requires rapid larval development.
This study derives from experiment with a micro-paddy lysimeter and laboratory experiment about Sympetrum spp. in the rice fields. Data on survival rate for Sympetrum spp. are different between early middle drainage and postpone drainage. Understanding the relationship between middle drainage and survival rate of larvae is supposed to aid rice field-dwelling species conservation.
|
