NWT 2011-2015 - NWT Species at Risk

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5. Results – What did we learn? Percent 1 for each group of species Group Extirpated At Risk May Be At Risk Sensitive Secure Undetermined Not Assessed Alien Vagrant 2 Presence Expected 2 Terrestrial Mammals 2% 9% 8% 62% 20% 1% 1% Marine Mammals 25% 75% 60% Birds 3% 2% 17% 59% 18% 1% 15% Fishes 1% 1% 7% 28% 15% 51% 2% 4% 14% Freshwater Mussels 50% 50% Amphibians 40% 20% 40% 17% Reptiles 100% 50% Ground Beetles (incl. Tiger Beetles) 1% 12% 87% Lady Beetles 4% 37% 59% Predaceous Diving Beeltes 61% 39% Bumblebees 14% 86% Butterflies 7% 75% 17% 1% 3% 1% Tiger Moths, Silk Moths, Underwing 3% 10% 87% Moths, Sphinx Moths Dragonflies and Damselflies 7% 2% 74% 17% Mosquitoes 56% 44% Blackflies, Horseflies, Deerflies 1% 82% 17% Grasshoppers 4% 13% 57% 26% 0% 0% Spiders 12% 88% Vascular Plants 13% 16% 52% 9% 10% 2% Mosses 8% 12% 36% 44% Lichens 6% 22% 47% 25% 6% TOTAL 0%
About Changes in Ranks between 2006 and 2011 For species that were ranked in 2006 and reviewed for 2011 and for which the rank was modified, we provide the reason for that modification in a “Reason for change” column in the following lists. See Changing Ranks – Keeping track of changes in the status of NWT species for more information. • Most changes in rank resulted from a more rigorous assessment of the perceived threats to vascular plants. Some vascular plant species appear rare because in the NWT they are at the edge of their natural distribution. Where potential threats could not be determined and where more sites were expected, the rank of some vascular plants were corrected to “Undetermined” from “May Be At Risk” to reflect a level of uncertainty. • New species contributed to 22% of the changes between 2006 and 2011. This is partly the result of increased monitoring and increased sharing of information about species. • About 5% of changes in the general status rank of species during the last five years can be attributed to a perceived higher risk of extirpation. Changes in perceived risk were recorded for bats and migratory birds. More detailed information is provided in the table below. Summary of changes in ranks between 2006 and 2011 Group UP Risk a DOWN Risk a Correcting Error New Species About Monitoring • Enthusiasm for wildlife and biodiversity in general, is great in the North. People are always interested in learning more about living organisms, and the land is a great teacher. Increasing monitoring efforts for the lesser-known groups of species, such as insects and plants, are possible as community members share information and organize new surveys. • The internet is used extensively to exchange information on species. In the past, high quality photographs of species were rare due to the prohibitive cost of equipment. Today, such photographs are essential to exchange information on species from all corners of the Northwest Territories. • In the section “8. Further Your Knowledge – How to learn more?” in this report, we included reputable web sites used by experts and biodiversity enthusiasts to exchange information on species. Easy-to-remember e-mail addresses, such as WILDLIFEOBS@gov.nt.ca, NWTBUGS@gov.nt.ca, also facilitate information sharing. • All information relevant to the general status ranking program is stored in the NWT Species Infobase, the main source of information on NWT species. • There is not enough information to determine the general status of more than 80% of ground beetles, bumblebees, large moths, and biting insects. Assessing the general status ranks of marine fishes has also proven difficult. New inventories of insects and the results of investigations in the Beaufort Sea during the International Polar Year will provide essential information for assessing the status of these groups of species in the future. New Information Taxonomic Change Changed to Presence Expected TOTAL Recent Detailed Assessment Mammals 2 0 0 3 0 0 0 5 0 Birds 5 0 4 7 3 0 0 19 5 Fishes 0 0 5 0 12 0 1 18 0 Freshwater Mussels 0 0 0 0 0 0 0 0 0 Amphibians 0 0 0 0 2 0 0 1 Reptiles 0 0 0 0 0 0 1 1 0 Tiger Beetles 0 0 0 0 0 0 0 0 0 Butterflies 0 0 1 1 0 0 0 2 0 Dragonflies and 0 0 0 1 0 0 0 1 0 Damselflies Vascular Plants 0 0 34 18 12 25 0 89 0 TOTAL 7 0 44 30 29 25 2 137 5 % 5% 0% 32% 22% 21% 18% 1% a Includes changes to subspecies/ecotypes. General Status Ranks of Wild Species in the Northwest Territories 15
Page 1 and 2: NWT NWT Species 2011-2015 | General
Page 3 and 4: NWT SPECIES 2011-2015 General Statu
Page 5 and 6: Executive Summary..................
Page 7 and 8: Preface - Building on our knowledge
Page 9 and 10: 2. Goals - What are we trying to ac
Page 11 and 12: Species Scope Which species are ran
Page 13 and 14: 191 ABNKD06075 Bird Falconiformes F
Page 15 and 16: Guideline Matrix For Scoring Indica
Page 17 and 18: Changing Ranks Keeping Track of Cha
Page 19: Summary of 2011 General Status Rank
Page 23 and 24: 6. Ranked Species Lists - What are
Page 25 and 26: On the Land “Going out on the lan
Page 27 and 28: Common Name Scientific Species Name
Page 31 and 32: List 2. Marine Mammals Four species
Page 33 and 34: Snow Bunting Photo Credit: J Nagy G
Page 45 and 46: studies of genetics, fluctuations i
Page 51 and 52: List 5. Freshwater Mussels There ar
Page 53 and 54: List 6. Amphibians and Reptiles Fiv
Page 55 and 56: in the NWT to salt plains habitat i
Page 67 and 68: Ocellate Creek Beetle Photo Credit:
Page 69 and 70: Bees, including bumblebees, are ext
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Butterflies are by far the most rec
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Common Name Scientific Species Name
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a Range Note: L = Species with limi
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and the larger better known groups
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The Odonates have large wings, elon
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Most species survive the winter as
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Third, they can be useful indicator
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Spiders (Araneae) belong to the art
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Many plant experts from the NWT and
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Edward Mock Wallflower Photo Credit
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Mosses are small, green, terrestria
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lichens Lichens are dual organisms,
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Data and Information Retrieving We
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Freshwater Mussels Clarke, A. H. 19
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Vascular Plants Aiken, S.G., Dallw
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10. Monitoring Infosheet To Partici
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NWT 2011-2015 - NWT Species at Risk

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