The floral biology of Platanthera dilatata (Pursh) Lindl. (Orchidaceae)
Thesis (M.Sc.)--Memorial University of Newfoundland, 1993. Biology Bibliography: leaves 92-101. The floral ecology of Platanthera dilatata (Pursh) Lindl. in St. Phillip's, Newfoundland, was investigated during the 1990-1992 flowering seasons. For comparison, two additional populations from east...
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ftmemorialunivdc:oai:collections.mun.ca:theses2/210625 2023-05-15T17:23:31+02:00 The floral biology of Platanthera dilatata (Pursh) Lindl. (Orchidaceae) Boland, J. Todd (Jeffrey Todd), 1965- Memorial University of Newfoundland. Dept. of Biology Canada--Newfoundland and Labrador 1993 x, 101 leaves : ill. Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses2/id/210625 Eng eng Electronic Theses and Dissertations (10.45 MB) -- http://collections.mun.ca/PDFs/theses/Boland_JTodd.pdf 76185083 http://collections.mun.ca/cdm/ref/collection/theses2/id/210625 The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Platanthera Orchids--Newfoundland and Labrador--Flowering Pollination by insects--Newfoundland and Labrador Text Electronic thesis or dissertation 1993 ftmemorialunivdc 2015-08-06T19:17:26Z Thesis (M.Sc.)--Memorial University of Newfoundland, 1993. Biology Bibliography: leaves 92-101. The floral ecology of Platanthera dilatata (Pursh) Lindl. in St. Phillip's, Newfoundland, was investigated during the 1990-1992 flowering seasons. For comparison, two additional populations from eastern Newfoundland and a population from southwestern Alberta were also examined. Pollinators were restricted to the nocturnal Noctuidae and diurnal Hesperiidae. While pollinators were rarely observed, pollination exclusion experiments indicated that insect vectors are required for capsule set. Percentage capsule set for the St. Phillip's site was similar in all three seasons (range = 47.7-56.0%). Two populations from eastern Newfoundland showed similar capsule set values while the population in southwestern Alberta had significantly higher capsule set (66.8%). Capsule set was determined to be pollinator-limited. Microhabitats had no effect on capsule set. P. dilatata has a number of physical characteristics which increased its opportunity for pollination. These include an extended blooming period, sequentially-produced flowers which are long-lived, long receptivity-time for flowers and continual odour production. The adaptations are particularly advantageous during periods of unfavourable weather and low pollinator activity. Additionally, it was observed that some populations can have seed production dramatically reduced due to insect damage and fungal infection. Thesis Newfoundland studies University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI) Newfoundland Canada |
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Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
op_collection_id |
ftmemorialunivdc |
language |
English |
topic |
Platanthera Orchids--Newfoundland and Labrador--Flowering Pollination by insects--Newfoundland and Labrador |
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Platanthera Orchids--Newfoundland and Labrador--Flowering Pollination by insects--Newfoundland and Labrador Boland, J. Todd (Jeffrey Todd), 1965- The floral biology of Platanthera dilatata (Pursh) Lindl. (Orchidaceae) |
topic_facet |
Platanthera Orchids--Newfoundland and Labrador--Flowering Pollination by insects--Newfoundland and Labrador |
description |
Thesis (M.Sc.)--Memorial University of Newfoundland, 1993. Biology Bibliography: leaves 92-101. The floral ecology of Platanthera dilatata (Pursh) Lindl. in St. Phillip's, Newfoundland, was investigated during the 1990-1992 flowering seasons. For comparison, two additional populations from eastern Newfoundland and a population from southwestern Alberta were also examined. Pollinators were restricted to the nocturnal Noctuidae and diurnal Hesperiidae. While pollinators were rarely observed, pollination exclusion experiments indicated that insect vectors are required for capsule set. Percentage capsule set for the St. Phillip's site was similar in all three seasons (range = 47.7-56.0%). Two populations from eastern Newfoundland showed similar capsule set values while the population in southwestern Alberta had significantly higher capsule set (66.8%). Capsule set was determined to be pollinator-limited. Microhabitats had no effect on capsule set. P. dilatata has a number of physical characteristics which increased its opportunity for pollination. These include an extended blooming period, sequentially-produced flowers which are long-lived, long receptivity-time for flowers and continual odour production. The adaptations are particularly advantageous during periods of unfavourable weather and low pollinator activity. Additionally, it was observed that some populations can have seed production dramatically reduced due to insect damage and fungal infection. |
author2 |
Memorial University of Newfoundland. Dept. of Biology |
format |
Thesis |
author |
Boland, J. Todd (Jeffrey Todd), 1965- |
author_facet |
Boland, J. Todd (Jeffrey Todd), 1965- |
author_sort |
Boland, J. Todd (Jeffrey Todd), 1965- |
title |
The floral biology of Platanthera dilatata (Pursh) Lindl. (Orchidaceae) |
title_short |
The floral biology of Platanthera dilatata (Pursh) Lindl. (Orchidaceae) |
title_full |
The floral biology of Platanthera dilatata (Pursh) Lindl. (Orchidaceae) |
title_fullStr |
The floral biology of Platanthera dilatata (Pursh) Lindl. (Orchidaceae) |
title_full_unstemmed |
The floral biology of Platanthera dilatata (Pursh) Lindl. (Orchidaceae) |
title_sort |
floral biology of platanthera dilatata (pursh) lindl. (orchidaceae) |
publishDate |
1993 |
url |
http://collections.mun.ca/cdm/ref/collection/theses2/id/210625 |
op_coverage |
Canada--Newfoundland and Labrador |
geographic |
Newfoundland Canada |
geographic_facet |
Newfoundland Canada |
genre |
Newfoundland studies University of Newfoundland |
genre_facet |
Newfoundland studies University of Newfoundland |
op_source |
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries |
op_relation |
Electronic Theses and Dissertations (10.45 MB) -- http://collections.mun.ca/PDFs/theses/Boland_JTodd.pdf 76185083 http://collections.mun.ca/cdm/ref/collection/theses2/id/210625 |
op_rights |
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. |
_version_ |
1766112974023426048 |