Effects of salinity on survival of the exotic seagrass Zostera japonica subjected to extreme high temperature stress
Abstract Zostera japonica is a non-indigenous seagrass that is expanding along the Pacific Coast of North America. The ecophysiology of this seagrass is poorly studied and management of the species is fragmented. This split-plot mesocosm experiment was designed to evaluate the response of Z. japonic...
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Published in | Botanica marina Vol. 56; no. 1; pp. 75 - 82 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
01.02.2013
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Online Access | Get full text |
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Abstract | Abstract
Zostera japonica
is a non-indigenous seagrass that is expanding along the Pacific Coast of North America. The ecophysiology of this seagrass is poorly studied and management of the species is fragmented. This split-plot mesocosm experiment was designed to evaluate the response of
Z. japonica
to chronic, extreme temperature and salinity stress to facilitate development of models to predict potential
Z. japonica
colonization. We collected
Z. japonica
plants from Padilla Bay, Washington and Yaquina Bay and Coos Bay, Oregon and exposed them to a constant water temperature of 15°C or 35°C at three different salinities (5, 20 and 35). After 7 days exposure, shoot survival ranged between 6% and 42%; after 9 days exposure, only a few plants from the Yaquina Bay population survived. At a ambient temperature (15°C), no differences were detected among the three salinity treatments. However, at a temperature of 35°C, the survival of plants grown at a salinity of 5 was significantly lower than at higher salinities (20 and 35). Although the effect of population was weak, the northern population appeared to be more susceptible to the combined effects of heat stress and low salinity than the southern populations. We suggest that
Z. japonica
will continue to spread southward along the Pacific coast of North America until it reaches systems that regularly exceed the temperature tolerances of this non-indigenous seagrass. |
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AbstractList | Abstract
Zostera japonica
is a non-indigenous seagrass that is expanding along the Pacific Coast of North America. The ecophysiology of this seagrass is poorly studied and management of the species is fragmented. This split-plot mesocosm experiment was designed to evaluate the response of
Z. japonica
to chronic, extreme temperature and salinity stress to facilitate development of models to predict potential
Z. japonica
colonization. We collected
Z. japonica
plants from Padilla Bay, Washington and Yaquina Bay and Coos Bay, Oregon and exposed them to a constant water temperature of 15°C or 35°C at three different salinities (5, 20 and 35). After 7 days exposure, shoot survival ranged between 6% and 42%; after 9 days exposure, only a few plants from the Yaquina Bay population survived. At a ambient temperature (15°C), no differences were detected among the three salinity treatments. However, at a temperature of 35°C, the survival of plants grown at a salinity of 5 was significantly lower than at higher salinities (20 and 35). Although the effect of population was weak, the northern population appeared to be more susceptible to the combined effects of heat stress and low salinity than the southern populations. We suggest that
Z. japonica
will continue to spread southward along the Pacific coast of North America until it reaches systems that regularly exceed the temperature tolerances of this non-indigenous seagrass. |
Author | Kaldy, James E. Shafer, Deborah J. |
Author_xml | – sequence: 1 givenname: James E. surname: Kaldy fullname: Kaldy, James E. organization: US EPA, Western Ecology Division, 2111 SE Marine Science Dr., Newport, OR 97365 – sequence: 2 givenname: Deborah J. surname: Shafer fullname: Shafer, Deborah J. organization: US Army Corps of Engineers, Engineer Research and Development Center, 3909 Halls Ferry Rd., Vicksburg, MS 39180, USA |
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CitedBy_id | crossref_primary_10_1371_journal_pone_0109167 crossref_primary_10_1016_j_scitotenv_2019_05_320 crossref_primary_10_1016_j_jembe_2014_12_015 crossref_primary_10_1016_j_marpolbul_2015_03_004 crossref_primary_10_1016_j_margeo_2020_106169 crossref_primary_10_1016_j_aquabot_2018_04_010 crossref_primary_10_1515_bot_2014_0088 crossref_primary_10_1111_ddi_13803 crossref_primary_10_3354_meps13884 crossref_primary_10_1038_srep41443 crossref_primary_10_1111_brv_12736 crossref_primary_10_1007_s00267_013_0172_z crossref_primary_10_3739_rikusui_75_113 crossref_primary_10_1016_j_jembe_2013_12_020 crossref_primary_10_3390_su152216065 crossref_primary_10_1371_journal_pone_0222798 |
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Zostera japonica
is a non-indigenous seagrass that is expanding along the Pacific Coast of North America. The ecophysiology of this seagrass is poorly... |
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