| dc.contributor.advisor | parker, william h. | |
| dc.contributor.author | xiao, baoying | |
| dc.date.accessioned | 2017-06-07t20:14:12z | |
| dc.date.available | 2017-06-07t20:14:12z | |
| dc.date.created | 2005 | |
| dc.date.issued | 2005 | |
| dc.identifier.uri | http://knowledgecommons.lakeheadu.ca/handle/2453/3306 | |
| dc.description.abstract | jack pine (pinus banksiana lamb.) is among the most widespread and most ecologically
and economically important species for planting and direct seeding in the lake states
and throughout much of the boreal forest of canada. focal point seed zones for
northwestern ontario jack pine were previously developed in the 1990’s but are in need
of revaluation and refinement based upon recent growth and mortality measurements
and more current climate models. updated focal point seed zones created for both
present and predicted future climate conditions will provide forest managers with seed
transfer guidelines that avoid maladaptation between seed sources and planting sites
under a range of current and future climate conditions.
to update the existing focal point seed zones and develop future focal point seed zones
of jack pine in northwestern ontario, the newest version o f the climate model ocm2
(1961-1990) was used to update the existing focal point seed zones, while four separate
climate change models (cgcm1, cgcm2, hadcm3, csiro) were used to develop
future focal point seed zones based on predicted future climate conditions. data obtained
from a freezing trial conducted by davradou (1992), as well as data for additional
growth and survival variables collected in recent years (1997, 2003 and 2004) were
incorporated when compared with the previous focal point seed zone studies of jack pine
in northcentral ontario and northwestern regions of ontario.
in total 23 and 47 biological variables including growth, phenological and freezing
variables were determined for each seed source in these two study areas. principal
components analysis (pca) was used to summarize the main components of variation
patterns. the first two pc axes represented growth potential and phenology, respectively,
for these two study areas. pca axis factor scores for seed sources were regressed against
current climatic variables. the significant regression equations were used to model the
patterns of adaptive variation. present and future focal point seed zones were produced
through intersecting the two contour maps by gis. future focal point seed zones include
where seed should go from a given location to best suit future climate conditions (seed
to) and where seed should come from now to be best adapted in the future to its planting
location (seed from).
under these different predicted future climate models, by the middle of this century,
seeds will transfer to the north or northeast to match the future climate conditions and
seeds should come from areas lying to the south or southeast of the planting location to
be best adapted to the future site. by the end of this century, the northward or northeastward
shift gradually slows and seed zones will move back under some climate scenarios. | |
| dc.language.iso | en_us | |
| dc.subject | jack pine ontario, northwestern geographical distribution | |
| dc.subject | jack pine genetics ontario, northwestern | |
| dc.subject | jack pine seeds ontario, northwestern | |
| dc.subject | focal point seed zone | |
| dc.title | present and future focal point seed zones for jack pine in northwestern region of ontario | |
| dc.type | thesis | |
| etd.degree.name | master of science | |
| etd.degree.level | master | |
| etd.degree.discipline | forestry and the forest environment | |
| etd.degree.grantor | 阿根廷vs墨西哥竞猜
| |
