J.M. Saarela, L.J. Gillespie, P.C. Sokoloff and R.D. Bull.
Floristic Discoveries and Biodiversity of the Canadian Arctic Vascular Plant Flora. Presented by J.M. Saarela at Arctic Change 2014, 8-12 December 2014, Ottawa, ON, Canada.
Call Girls In Okhla DELHI ~9654467111~ Short 1500 Night 6000
Floristic discoveries and biodiversity of the Canadian Arctic vascular plant flora
1. Floristic Discoveries and Biodiversity
of the Canadian Arctic Vascular Plant Flora
J.M. Saarela, L.J. Gillespie, P.C. Sokoloff and R.D. Bull
Centre for Arctic
Knowledge and Exploration
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
3. Arctic Plant Taxonomy
a small flora but major challenges
• numerous taxonomically difficult species groups
- hybridization
- high polyploidy
- frequent asexual reproduction
• many different regional treatments
- widespread species (circumpolar)
- different species concepts (Russia vs. Euro vs. NA)
- different names
• few or no plant collections from many remote areas
inventories not comprehensive
- sites difficult and expensive to access
4. • 91 families
• 420 genera
• 2218 species
Elven et al. (2011)
http://nhm2.uio.no/paf/
Checklist of the Panarctic Flora - Vascular Plants
6. Floristics
the study of the distribution, number, types, and
relationships of plant species in an area or areas
7. Arctic Floristic Research
• critical baseline data
understanding change
in vegetation
may inform monitoring
• detailed info about plants
of specific regions (e.g.,
parks, communities,
islands)
• data for flora projects
• samples for systematic,
phylogeographic, DNA
barcoding studies, etc.
11. Based on study of all
collections made in area from
ca. 1940 to 2009, including
ours, the vascular flora of
the region comprises 268
taxa (265 species), of
which 215 are in the Park
16% increase from the first
study of the area in 1990
48 taxa new to the region
54 taxa newly recorded for
TNNP
Tuktut Nogait National Park and vicinity, NWT
Saarela et al. 2013, Phytotaxa
15. Our fieldwork: 12 species and 3 families*
new to Canadian Arctic Archipelago
341
368
349
375
320
330
340
350
360
370
380
Aiken et al. (2007) Gillespie et al. (in review)
species
taxa
including new literature
records, post 2007
c. 8% increase
24. • c. 19 species
new to the
western CAA
• c. 30 species
new to Victoria
Island
• increased # of
species from
231 to c. 261
Victoria Island – new records
27. accurate info on current species distributions are needed to
understand possible future change
Most new records
likely long established
species
Newly arrived or long established species?
29. *
many new
localities
NOT at risk
Asteraceae
Symphyotrichum pygmaeum
Pygmy aster
“May be at risk” (NWT 2011)
Aiken et al. 2007
30. SE Baffin Island
many new records
of rare species
• Viscaria alpina (Caryophyllaceae)
• Plantago maritima (Plantaginaceae)
• 5 sedges (Carex arctogena, C. bicolor, C. gynocrates, C. vaginata, C. williamsii)
• 3 rushes (Luzula wahlenbergii, L. multiflora subsp. frigida, Juncus trifidus
• 2 grasses (Calamagrostis canadensis subsp. langsdorfii, C. purpurascens)
• Sibbaldia procumbens (Rosaceae), Corallorhiza trifida (Orchidaceae)
• …and many more
Viscariaalpina
Carexarctogena