Sulfur cycling and sulfide intrusion in mixed Southeast Asian tropical seagrass meadows

Marianne Holmer; Ole Pedersen; Kou Ikejima

doi:10.1515/BOT.2006.013

Sulfur cycling and sulfide intrusion in mixed Southeast Asian tropical seagrass meadows

Marianne Holmer, Ole Pedersen, Kou Ikejima

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

39 Citationer (Scopus)

Abstract

Udgivelsesdato: Apr 2006

Originalsprog	Engelsk
Tidsskrift	Botanica Marina
Vol/bind	49
Udgave nummer	2
Sider (fra-til)	91-102
ISSN	0006-8055
DOI	https://doi.org/10.1515/BOT.2006.013
Status	Udgivet - 2006

Bibliografisk note

Keywords nutrient, seagrasses, sediment, sulfate reduction, sulfide intrusion

Adgang til dokumentet

10.1515/BOT.2006.013

Citationsformater

@article{6190e8806c3711dcbee902004c4f4f50,

title = "Sulfur cycling and sulfide intrusion in mixed Southeast Asian tropical seagrass meadows",

abstract = "Seagrass distribution and sediment biogeochemical conditions were measured around Libong Island in the Andaman Sea, Thailand. Seagrass diversity was moderate for a tropical site (four species found: Cymodocea rotundata, Enhalus acoroides, Halophila ovalis and Thalassia hemprichii), with the diminutive species H. ovalis particularly abundant and perhaps serving as important food for dugongs present in the area. Although the sediment organic matter content was low in the seagrass meadows, the sulfate reduction rates were high (48-138 mmol m-2 d-1). A significant positive relationship between belowground biomass and sulfate reduction rates across the seagrass species examined indicates that stimulation of microbial activity in the rhizosphere sediments is controlled by the biomass of roots and rhizomes, rather than by specific seagrass characteristics (e.g., morphology, plant activity). The low iron contents in the seagrass tissues were within the range suggested for nutrient limitation. Sediment sulfur pools, in particular pyrite pools, were high and most of the available iron was bound in sulfides, which may cause iron limitation in seagrass tissues. High sediment sulfide production and sulfide accumulation in concert exert sulfide stress on the seagrasses, as indicated by an accumulation of elemental sulfur in the plants examined, suggesting that tropical seagrasses are prone to sulfide intrusion, similar to findings for temperate seagrasses.",

author = "Marianne Holmer and Ole Pedersen and Kou Ikejima",

note = "Keywords nutrient, seagrasses, sediment, sulfate reduction, sulfide intrusion",

year = "2006",

doi = "10.1515/BOT.2006.013",

language = "English",

volume = "49",

pages = "91--102",

journal = "Botanica Marina",

issn = "0006-8055",

publisher = "Walterde Gruyter GmbH",

number = "2",

}

TY - JOUR

T1 - Sulfur cycling and sulfide intrusion in mixed Southeast Asian tropical seagrass meadows

AU - Holmer, Marianne

AU - Pedersen, Ole

AU - Ikejima, Kou

N1 - Keywords nutrient, seagrasses, sediment, sulfate reduction, sulfide intrusion

PY - 2006

Y1 - 2006

N2 - Seagrass distribution and sediment biogeochemical conditions were measured around Libong Island in the Andaman Sea, Thailand. Seagrass diversity was moderate for a tropical site (four species found: Cymodocea rotundata, Enhalus acoroides, Halophila ovalis and Thalassia hemprichii), with the diminutive species H. ovalis particularly abundant and perhaps serving as important food for dugongs present in the area. Although the sediment organic matter content was low in the seagrass meadows, the sulfate reduction rates were high (48-138 mmol m-2 d-1). A significant positive relationship between belowground biomass and sulfate reduction rates across the seagrass species examined indicates that stimulation of microbial activity in the rhizosphere sediments is controlled by the biomass of roots and rhizomes, rather than by specific seagrass characteristics (e.g., morphology, plant activity). The low iron contents in the seagrass tissues were within the range suggested for nutrient limitation. Sediment sulfur pools, in particular pyrite pools, were high and most of the available iron was bound in sulfides, which may cause iron limitation in seagrass tissues. High sediment sulfide production and sulfide accumulation in concert exert sulfide stress on the seagrasses, as indicated by an accumulation of elemental sulfur in the plants examined, suggesting that tropical seagrasses are prone to sulfide intrusion, similar to findings for temperate seagrasses.

AB - Seagrass distribution and sediment biogeochemical conditions were measured around Libong Island in the Andaman Sea, Thailand. Seagrass diversity was moderate for a tropical site (four species found: Cymodocea rotundata, Enhalus acoroides, Halophila ovalis and Thalassia hemprichii), with the diminutive species H. ovalis particularly abundant and perhaps serving as important food for dugongs present in the area. Although the sediment organic matter content was low in the seagrass meadows, the sulfate reduction rates were high (48-138 mmol m-2 d-1). A significant positive relationship between belowground biomass and sulfate reduction rates across the seagrass species examined indicates that stimulation of microbial activity in the rhizosphere sediments is controlled by the biomass of roots and rhizomes, rather than by specific seagrass characteristics (e.g., morphology, plant activity). The low iron contents in the seagrass tissues were within the range suggested for nutrient limitation. Sediment sulfur pools, in particular pyrite pools, were high and most of the available iron was bound in sulfides, which may cause iron limitation in seagrass tissues. High sediment sulfide production and sulfide accumulation in concert exert sulfide stress on the seagrasses, as indicated by an accumulation of elemental sulfur in the plants examined, suggesting that tropical seagrasses are prone to sulfide intrusion, similar to findings for temperate seagrasses.

U2 - 10.1515/BOT.2006.013

DO - 10.1515/BOT.2006.013

M3 - Journal article

SN - 0006-8055

VL - 49

SP - 91

EP - 102

JO - Botanica Marina

JF - Botanica Marina

IS - 2

ER -