1996 Fiscal Year Final Research Report Summary
BENTHIC ANIMALS IN SHALLOW WATERS THAT CAN EXPLOIT CHEMOSYNTHETIC PRIMARY PRODUCTION
| Project/Area Number |
07836012
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 時限 |
|---|
| Research Field |
海洋生物学
|
|---|
| Research Institution | PREFECTURAL UNIVERSITY OF KUMAMOTO |
|---|
Principal Investigator |
TSUTSUMI Hiroaki GENERAL EDUCATION,FACULTY OF HUMAN LIFE SCIENCES,PREFECTURAL UNIVERSITY OF KUMAMOTO, 生活科学部, 助教授 (50197737)
|
|---|
| Project Period (FY) |
1995 – 1996
|
| Keywords | CAPITELLA / HYDROGEN SULPHIDE / ORGANIC ENRICHMENT / CHEMOSYNTHESIS |
|---|
| Research Abstract |
Benthic communities, which rely on primary production by chemoautotrophic sulfur bacteria, have been discovered not only around hydrothermal vents, where heated water with extremely high levels of H_2S is emitted, but also in organically enriched sediments of estuaries and on mud flats, where sulfate-reducing bacteria decompose organic matter anaerobically producing H_2S.The benthic communities which rely on primary production by chemoautotrophic sulfur bacteriia appear to be widespread in sulfide-rich marine ecosystems. In this study, we report that growth of a deposit-feeding polychaete, Capitella sp. I, which is a dominant macrofaunal species in organically enriched sediments in coastal areas, was greatly enhanced by exposure to H_2S.The large worms grown in high levels of sulfide had significantly lower delta^<13>C values (mean, -24.4% than Control worms (mean, -20.1%). The worms appear to achieve normal growthrelying on the chemosynthetic production.
|
