Uprooting of <I>Zostera Marina</I> Shoots in Relation to the Belowground Biomass Reduction in Nagatsuraura Bay, Japan

DOI Web Site 1 Citations 10 References

Bibliographic Information

Other Title
  • 閉鎖性海域である宮城県長面浦湾におけるアマモ草体の流出機構の検討
  • ヘイサセイ カイイキ デ アル ミヤギケン ナガツラウラワン ニ オケル アマモ ソウタイ ノ リュウシュツ キコウ ノ ケントウ

Search this article

Abstract

The objective of this study is to investigate the effect of belowground biomass reduction on the stability of eelgrass shoots in sediment in order to clarify the factors responsible for the outflow of eelgrass shoots even with little wave disturbance in Nagatsuraura Bay, Japan. We also investigated environmental conditions in the vicinity of eelgrass with and without root death. Loss of roots without dying-back symptoms led to a decrease in the stability of eelgrass shoots in sediment, and allows for the uprooting of shoots with little disturbance. The decay of healthy root biomass of eelgrass was associated with high sulfide concentration in sediment and/or low photosynthetic activity. In sulfide concentrations between 0.5mg g D.W.-1 and 1.5mg g D.W.-1, eelgrass with high photosynthetic activity tended to display fewer stunted roots compared to shoots for which photosynthetic rates were low. This result suggests that eelgrass with high photosynthetic activity seemed to prevent sulfide intrusion by supplying oxygen to belowground tissues to maintain an oxic microsphere around the roots and re-oxidizing it to a harmless sulfate.

Journal

Citations (1)*help

See more

References(10)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top