Table 2: Evaporation from individual shoots of antarctic mosses
Experimental observations on pathways of water movement are discussed in relation to anatomical and micromorphological features of five moss species from Signy Island, South Orkney Islands. Significant internal uptake of water was recorded only in the mesic species Polytrichum alpinum (internal=>...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.762899 2023-05-15T13:55:14+02:00 Table 2: Evaporation from individual shoots of antarctic mosses Noakes, T D Longton, R E LATITUDE: -60.700001 * LONGITUDE: -45.599998 * DATE/TIME START: 1988-12-19T00:00:00 * DATE/TIME END: 2000-03-30T00:00:00 1988-07-11 text/tab-separated-values, 162 data points https://doi.pangaea.de/10.1594/PANGAEA.762899 https://doi.org/10.1594/PANGAEA.762899 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.762899 https://doi.org/10.1594/PANGAEA.762899 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Noakes, T D; Longton, R E (1988): 2.4 Pathways of water movement in relation to structure and micromorphology in Antarctic Mosses. Polarforschung, 58(2/3), 125-138, hdl:10013/epic.29608.d001 Andreaea gainii Bartrania patens Drepanocladus unicinatus g0306p1 Parameter Polytrichum alpinum Schistidium antarctici SeaLevel Signy Specification TGS Tide gauge station Unit Weddell Sea Dataset 1988 ftpangaea https://doi.org/10.1594/PANGAEA.762899 2023-01-20T08:52:29Z Experimental observations on pathways of water movement are discussed in relation to anatomical and micromorphological features of five moss species from Signy Island, South Orkney Islands. Significant internal uptake of water was recorded only in the mesic species Polytrichum alpinum (internal=>60% of total) and Bartramia patens (internal=c.30% of total), in experiments in which uptake by cut shoots was compared in individuals with the external pathway blocked, and others with both external and internal pathways open. Internal uptake maintained shoot water content close to full turgor in P. alpinun and at 30% of full tugor in B. patens, whereas water content fell to 12-15% dry wt. in the lithophytes Andreaea gainii and Schistidium antarctici and in the mesic/hydric species Drepanocladus uncinatus, with the external pathway blocked. Where both pathways were open water uptake from below maintained water content at or above full turgor in shoots of all five species. External water uptake by capillarity occurred most rapidly in the lithophytes, and was slower in initially air-dry than in hydrated shoots of the other species. The spreading limbs of leaves in B. patens and P. alpinum are water-repellent, as are the bright green leaves in the apical 1-2 mm of dry shoots of the lithophytes. A central strand of hydroids is well-developed only in B. patens and P. alpinum. These two species have deposits of surface wax on parts of the leaves, and surface wax also occurs on the green apical leaves in some specimens of S. antarcticum and other lithophytes from Signy Island. Dataset Antarc* Antarctic Polarforschung Schistidium antarctici Signy Island South Orkney Islands Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Weddell Weddell Sea ENVELOPE(-45.599998,-45.599998,-60.700001,-60.700001) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Andreaea gainii Bartrania patens Drepanocladus unicinatus g0306p1 Parameter Polytrichum alpinum Schistidium antarctici SeaLevel Signy Specification TGS Tide gauge station Unit Weddell Sea |
spellingShingle |
Andreaea gainii Bartrania patens Drepanocladus unicinatus g0306p1 Parameter Polytrichum alpinum Schistidium antarctici SeaLevel Signy Specification TGS Tide gauge station Unit Weddell Sea Noakes, T D Longton, R E Table 2: Evaporation from individual shoots of antarctic mosses |
topic_facet |
Andreaea gainii Bartrania patens Drepanocladus unicinatus g0306p1 Parameter Polytrichum alpinum Schistidium antarctici SeaLevel Signy Specification TGS Tide gauge station Unit Weddell Sea |
description |
Experimental observations on pathways of water movement are discussed in relation to anatomical and micromorphological features of five moss species from Signy Island, South Orkney Islands. Significant internal uptake of water was recorded only in the mesic species Polytrichum alpinum (internal=>60% of total) and Bartramia patens (internal=c.30% of total), in experiments in which uptake by cut shoots was compared in individuals with the external pathway blocked, and others with both external and internal pathways open. Internal uptake maintained shoot water content close to full turgor in P. alpinun and at 30% of full tugor in B. patens, whereas water content fell to 12-15% dry wt. in the lithophytes Andreaea gainii and Schistidium antarctici and in the mesic/hydric species Drepanocladus uncinatus, with the external pathway blocked. Where both pathways were open water uptake from below maintained water content at or above full turgor in shoots of all five species. External water uptake by capillarity occurred most rapidly in the lithophytes, and was slower in initially air-dry than in hydrated shoots of the other species. The spreading limbs of leaves in B. patens and P. alpinum are water-repellent, as are the bright green leaves in the apical 1-2 mm of dry shoots of the lithophytes. A central strand of hydroids is well-developed only in B. patens and P. alpinum. These two species have deposits of surface wax on parts of the leaves, and surface wax also occurs on the green apical leaves in some specimens of S. antarcticum and other lithophytes from Signy Island. |
format |
Dataset |
author |
Noakes, T D Longton, R E |
author_facet |
Noakes, T D Longton, R E |
author_sort |
Noakes, T D |
title |
Table 2: Evaporation from individual shoots of antarctic mosses |
title_short |
Table 2: Evaporation from individual shoots of antarctic mosses |
title_full |
Table 2: Evaporation from individual shoots of antarctic mosses |
title_fullStr |
Table 2: Evaporation from individual shoots of antarctic mosses |
title_full_unstemmed |
Table 2: Evaporation from individual shoots of antarctic mosses |
title_sort |
table 2: evaporation from individual shoots of antarctic mosses |
publisher |
PANGAEA |
publishDate |
1988 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.762899 https://doi.org/10.1594/PANGAEA.762899 |
op_coverage |
LATITUDE: -60.700001 * LONGITUDE: -45.599998 * DATE/TIME START: 1988-12-19T00:00:00 * DATE/TIME END: 2000-03-30T00:00:00 |
long_lat |
ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-45.599998,-45.599998,-60.700001,-60.700001) |
geographic |
Antarctic Signy Island South Orkney Islands Weddell Weddell Sea |
geographic_facet |
Antarctic Signy Island South Orkney Islands Weddell Weddell Sea |
genre |
Antarc* Antarctic Polarforschung Schistidium antarctici Signy Island South Orkney Islands Weddell Sea |
genre_facet |
Antarc* Antarctic Polarforschung Schistidium antarctici Signy Island South Orkney Islands Weddell Sea |
op_source |
Supplement to: Noakes, T D; Longton, R E (1988): 2.4 Pathways of water movement in relation to structure and micromorphology in Antarctic Mosses. Polarforschung, 58(2/3), 125-138, hdl:10013/epic.29608.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.762899 https://doi.org/10.1594/PANGAEA.762899 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.762899 |
_version_ |
1766261546761060352 |