Wild species 2010: chapter 26

Section 4: Conclusion

Summary of the results

Previous Wild Species reports presented the general status assessments for respectively 1670 species in the 2000 report and for 7732 species in the 2005 report. In the Wild Species 2010 report, the general status assessments of 11 950 species are presented. This report represents a huge achievement, by publishing the results for 20 taxonomic groups, including lichens, mosses, vascular plants, freshwater mussels, spiders, odonates, predaceous diving beetles, ground beetles, lady beetles, bumblebees, black flies, horse flies, mosquitoes, some selected macromoths, butterflies, crayfishes, amphibians, reptiles, birds and mammals. The largest group assessed was the vascular plants, with 5111 species, demonstrating the commitment of botanists across the country to assessing and conserving Canada’s plants. The most species-rich regions are Ontario (6995 species, figure 26), British Columbia (6841 species) and Quebec (6150 species), due to the variation in climate and geology that provide diverse habitats in which different species can survive. However, the region with the highest diversity (species richness/area) is Prince Edward Island; the region where you can see the highest number of species in the smallest area!

Figure 26. Results of the general status assessments for all species in the Wild Species 2010 report in Canada.
Bar graph (see long description below)
Long description for Figure 26

Figure 26 shows the results of the general status assessments for all species in the Wild Species 2010 report in Canada. The bar graph shows the number of species for all taxonomic groups ranked as Extinct, Extirpated, At Risk, May Be At Risk, Sensitive, Secure, Undetermined, Not assessed, Exotic, and Accidental in Canada, each province and territory and the 4 oceanic regions. Of the 11950 total of all species occurring in all of Canada, 5 were ranked as Extinct, 35 as Extirpated, 247 as At Risk, 806 as May Be at Risk, 960 as Sensitive, 6600 as Secure, 1586 as Undetermined, 32 as Not Assessed, 1426 as Exotic and 253 as Accidental. Of the 3305 species occurring in the Yukon, 1 was ranked as Extirpated, 5 as At Risk, 302 as May Be at Risk, 453 as Sensitive, 1608 as Secure, 721 as Undetermined, 20 as Not Assessed, 106 as Exotic and 89 as Accidental. Of the 3302 species occurring in the Northwest Territories, 7 were ranked as At Risk, 231 as May Be at Risk, 385 as Sensitive, 1447 as Secure, 1029 as Undetermined, 38 as Not Assessed, 121 as Exotic and 44 as Accidental. Of the 1757 species occurring in Nunavut, 1 was ranked as Extinct, 1 as Extirpated, 5 as At Risk, 223 as May Be at Risk, 279 as Sensitive, 672 as Secure, 395 as Undetermined, 57 as Not Assessed, 17 as Exotic and 107 as Accidental. Of the 6841 species occurring in British Columbia, 1 was ranked as Extinct, 9 as Extirpated, 85 as At Risk, 580 as May Be at Risk, 1006 as Sensitive, 3196 as Secure, 1001 as Undetermined, 26 as Not Assessed, 788 as Exotic and 149 as Accidental. Of the 5075 species occurring in Alberta, 1 was ranked as Extinct, 5 as Extirpated, 23 as At Risk, 435 as May Be at Risk, 626 as Sensitive, 2546 as Secure, 975 as Undetermined, 15 as Not Assessed, 343 as Exotic and 106 as Accidental. Of the 4143 species occurring in Saskatchewan, 1 was ranked as Extinct, 6 as Extirpated, 39 as At Risk, 603 as May Be at Risk, 192 as Sensitive, 1816 as Secure, 760 as Undetermined, 271 as Not Assessed, 324 as Exotic and 131 as Accidental. Of the 4513 species occurring on Manitoba, 1 was ranked as Extinct, 7 as Extirpated, 33 as At Risk, 452 as May Be at Risk, 256 as Sensitive, 1761 as Secure, 1459 as Undetermined, 50 as Not Assessed, 388 as Exotic and 106 as Accidental. Of the 6995 species occurring in Ontario, 2 were ranked as Extinct, 34 as Extirpated, 118 as At Risk, 863 as May Be at Risk, 429 as Sensitive, 3312 as Secure, 868 as Undetermined, 12 as Not Assessed, 1138 as Exotic and 219 as Accidental. Of the 6150 species occurring in Quebec, 3 were ranked as Extinct, 16 as Extirpated, 68 as At Risk, 600 as May Be at Risk, 525 as Sensitive, 2914 as Secure, 976 as Undetermined, 55 as Not Assessed, 857 as Exotic and 136 as Accidental. Of the 4178 species occurring in New Brunswick, 3 were ranked as Extinct, 10 as Extirpated, 29 as At Risk, 274 as May Be at Risk, 269 as Sensitive, 1999 as Secure, 816 as Undetermined, 4 as Not Assessed, 617 as Exotic and 157 as Accidental. Of the 4234 species occurring in Nova Scotia, 3 were ranked as Extinct, 13 as Extirpated, 26 as At Risk, 290 as May Be At Risk, 403 as Sensitive, 1780 as Secure, 827 as Undetermined, 17 as Not Assessed, 696 as Exotic and 179 as Accidental. Of the 2318 species occurring in Prince Edward Island, 1 was ranked as Extinct, 14 as Extirpated, 7 as At Risk, 302 as May Be at Risk, 178 as Sensitive, 941 as Secure, 316 as Undetermined, 6 as Not Assessed, 422 as Exotic and 131 as Accidental. Of the 3549 species occurring in Newfoundland and Labrador, 2 were ranked as Extinct, 27 as At Risk, 190 as May Be at Risk, 318 as Sensitive, 1502 as Secure, 823 as Undetermined, 140 as Not Assessed, 355 as Exotic and 192 as Accidental. Of the 32 species occurring in the Pacific Ocean region, 8 were ranked as At Risk, 4 as Sensitive, 8 as Secure, 7 as Undetermined and 5 as Accidental. Of the 10 species occurring in the Western Arctic Ocean region, 1 was ranked as Sensitive, 2 as Secure, 2 as Undetermined and 5 as Accidental. Of the 10 species occurring in the Eastern Arctic Ocean region, 5 were ranked as Sensitive, 4 as Secure and 1 as Undetermined. Of the 36 species occurring in the Atlantic Ocean region, 1 was ranked as Extinct, 1 as Extirpated, 4 as At Risk, 7 as Sensitive, 14 as Secure, 3 as Undetermined and 6 as Accidental.

Proportion of species ranked as Secure

The majority of the 11 950 species assessed in this report received Canada ranks of Secure (6600 species, 55%). However, part of the variation in the proportion of species with low or high levels of risk is associated with variation in the proportion of species with Canada ranks of Extinct, Extirpated, Undetermined, Not Assessed, Exotic or Accidental (e.g. bumblebees have a large proportion of species ranked Undetermined, and a correspondingly small proportion of species ranked Secure). Therefore, to get a clearer picture of which species groups are most secure, or most at risk, we can focus just on species with Canada ranks of At Risk, May Be At Risk, Sensitive and Secure (table 38). The proportion of species ranked as Secure within these categories ranged from 33% to 98%. Reptiles (33%) and freshwater mussels (39%) are the taxonomic groups that have the lowest proportion of species ranked as Secure. At the opposite, ground beetles (88%), bumblebees (94%), mosquitoes (95%) and predaceous diving beetles (98%) were the taxonomic groups that had the highest proportion of species ranked as Secure. However, the high percentages of species ranked as Secure in these taxonomic groups might still reflect our lack of knowledge on these species, since they were also among the taxonomic groups with the highest proportion of species ranked as Undetermined or Not Assessed.

When excluding species ranked as Extinct, Extirpated, Undetermined, Not Assessed, Exotic or Accidental, 77% of the species assessed in the Wild Species 2010 report had Canada General Status Ranks (Canada ranks) of Secure.

Table 38. Number of assessed species (n = 11 950) in the Wild Species 2010 report according to the different taxonomic groups.
Taxonomic group Number of species Proportion of Secure*
Lichens 861 72%
Mosses 1006 76%
Vascular plants 5111 71%
Molluscs - Freshwater mussels 54 39%
Spiders 1379 86%
Insects - Odonates 211 78%
Insects - Predaceous diving beetles 275 98%
Insects - Ground beetles 934 88%
Insects - Lady beetles 166 84%
Insects - Bumblebees 41 94%
Insects - Black flies 162 91%
Insects - Horse flies 144 85%
Insects - Mosquitoes 80 95%
Insects - Selected macromoths 236 84%
Insects - Butterflies 302 82%
Crustaceans - Crayfishes 11 78%
Amphibians 47 67%
Reptiles 48 33%
Birds 664 78%
Mammals 218 72%
Totals 11 950 77%

* When excluding species ranked as Extinct, Extirpated, Undetermined, Not Assessed, Exotic or Accidental.

Species ranked as May Be At Risk

One of the aims of the Wild Species series is to help COSEWIC prioritize species for detailed status assessments. The species that are ranked as May Be At Risk by the National General Status Working group are species that could be candidates for more detailed assessments by COSEWIC. In this report, a total of 806 species were ranked as May Be At Risk (table 39). The taxonomic groups that had the most species ranked as May Be At Risk were the vascular plants (444 species), followed by lichens (100 species), mosses (71 species) and spiders (62 species). The complete list (among assessed taxonomic groups) of species ranked as May Be At Risk can be found on the Wild Species website in the database or in the search tool.

Table 39. Number of species ranked by the National General Status Working Group as May Be At Risk at the Canada level that could be potential candidates for a more detailed assessment by COSEWIC.
Taxonomic group Number of species Proportion of Secure*
Lichens 100 12%
Mosses 71 9%
Vascular plants 444 55%
Molluscs - Freshwater mussels 6 1%
Spiders 62 8%
Insects - Odonates 22 3%
Insects - Predaceous diving beetles 2 1%
Insects - Ground beetles 36 4%
Insects - Lady beetles 0 0%
Insects - Bumblebees 1 1%
Insects - Black flies 0 0%
Insects - Horse flies 11 1%
Insects - Mosquitoes 0 0%
Insects - Selected macromoths 9 1%
Insects - Butterflies 19 2%
Crustaceans - Crayfishes 0 0%
Amphibians 0 0%
Reptiles 0 0%
Birds 12 1%
Mammals 11 1%
Totals 806 100%

Exotic species

Exotic species have been introduced to Canada, both deliberately and accidentally, from around the world. In addition, species with regional ranks of Exotic are often native species that have been moved from regions of the country in which they traditionally occur, to regions in which they are not naturally found. Whether from abroad, or from a different part of Canada, exotic species can cause problems for native species in a variety of ways, including competition for space and resources, predation, hybridization and introduction of new diseases. On the 11 950 species assessed, a total of 1426 species were ranked as Exotic. Most of the species that were given a Canada rank of Exotic in this report are vascular plants (1252 species), representing 89% of all Exotic species. Vascular plants have the highest proportion of Exotic species of any group covered in this report (table 40). Other taxonomic groups that had many Exotic species were the spiders (70 species) and the ground beetles (54 species). The complete list (among assessed taxonomic groups) of Exotic species can be found on the Wild Species website in the database or in the search tool.

Table 40. Number of species ranked by the National General Status Working Group as Exotic at the Canada level.
Taxonomic group Number of species Proportion of Secure*
Lichens 1 0%
Mosses 4 0%
Vascular plants 1252 89%
Molluscs - Freshwater mussels 0 0%
Spiders 70 5%
Insects - Odonates 0 0%
Insects - Predaceous diving beetles 0 0%
Insects - Ground beetles 54 4%
Insects - Lady beetles 7 0%
Insects - Bumblebees 0 0%
Insects - Black flies 0 0%
Insects - Horse flies 0 0%
Insects - Mosquitoes 3 0%
Insects - Selected macromoths 7 0%
Insects - Butterflies 2 0%
Crustaceans - Crayfishes 2 0%
Amphibians 0 0%
Reptiles 2 0%
Birds 11 1%
Mammals 11 1%
Totals 1426 100%

Lack of knowledge

For most species groups and regions, the proportion of species ranked Undetermined or Not Assessed is variable. For some taxonomic groups such as vertebrates, the information on the status of the species is relatively well known. However, for other taxonomic groups, the amount of information is not as abundant. One purpose of this report is to encourage more information to be collected on species currently ranked as Undetermined or Not Assessed. In this report, a total of 1618 species had these ranks because of a lack of knowledge (table 41). The taxonomic group that had the highest number of species ranked as Undetermined or Not Assessed was the spiders (477 species), representing 29% of all the species with these ranks. Other taxonomic groups, such as ground beetles (260 species), mosses (235 species), and lichens (218 species) had also a large number of species ranked as Undetermined or Not Assessed. As well, approximately 60 000 Canadian species, primarily invertebrates, remain too poorly known for inculsion in this report. We hope that more information will become available for those groups as well.

Without information on the status of these species, it is difficult to judge how the human uses affect the ecosystems and species. As the Wild Species program assesses species groups which are not well-known or not well-studied in Canada, the proportion of species that receive ranks of Undetermined and Not Assessed is likely to rise.

Table 41. Number of species ranked by the National General Status Working Group as Undetermined or Not Assessed at the Canada level.
Taxonomic group Number of species Proportion of Secure*
Lichens 218 13%
Mosses 235 15%
Vascular plants 135 8%
Molluscs - Freshwater mussels 2 0%
Spiders 477 29%
Insects - Odonates 11 1%
Insects - Predaceous diving beetles 64 4%
Insects - Ground beetles 260 16%
Insects - Lady beetles 67 4%
Insects - Bumblebees 25 2%
Insects - Black flies 34 2%
Insects - Horse flies 23 1%
Insects - Mosquitoes 11 1%
Insects - Selected macromoths 29 2%
Insects - Butterflies 11 1%
Crustaceans - Crayfishes 0 0%
Amphibians 0 0%
Reptiles 1 0%
Birds 4 0%
Mammals 11 1%
Totals 1618 100%

Changes in species status

One of the important achievements of this report is to update the status assessments of taxonomic groups that were included in previous Wild Species reports. Among the taxonomic groups that were reassessed in this report, a total of 626 species had a change in their Canada rank.

In total, 15% of the changes involved species moving into a rank with an increased level of risk (95 changes, table 42), 27% involved species moving into a rank with a reduced level of risk (166 changes), and 16% involved species moving into or out of the Undetermined, Not Assessed, Exotic or Accidental ranks (102 changes). Updates have also resulted in the addition of 162 new species to the national list (26% of the changes). Just as importantly, 101 species have been removed from the national list (16% of changes). Updating the national species lists in this way keeps the General Status program and the Wild Species series abreast of the latest scientific knowledge.

Most of these changes were due to improved knowledge of the species (table 43). This reason accounted for more than half of all the changes observed in the Canada ranks. Taxonomic changes, biological changes, and changes due to new COSEWIC detailed assessments also accounted for an important part of the reasons of the changes.

Table 42. Changes (n = 626) in the level of risk for species in taxonomic groups that were reassessed in the Wild Species 2010 report.
Taxonomic group Number of species
with increased level of risk
Number of species
with reduced level of risk
Number of species
changed from/to
ranks 5, 6, 7, or 8*
Number of new species Number of deleted species
Vascular plants 54 132 84 131 94
Freshwater mussels 4 1 2 0 1
Odonates 1 14 6 3 1
Tiger beetles 3 1 0 1 0
Butterflies 3 13 3 11 2
Crayfishes 0 0 0 0 0
Amphibians 1 1 0 1 0
Reptiles 4 1 0 1 0
Birds 23 1 4 12 1
Mammals 2 2 3 2 2
Totals 95
(15%)
166
(27%)
102
(16%)
162
(26%)
101
(16%)

* Note: 5 = Undetermined, 6 = Not Assessed, 7 = Exotic, 8 = Accidental.

 

Table 43. Summary of the reasons for changes in the status of species between the last assessment and the current report.
Code Description Number of species Proportion of all changes
B Change due to biological change in species’ population size, distribution or threats. 63 10%
C Change due to new COSEWIC assessment. 64 10%
E Change due to error in previous ranks. 10 2%
I Change due to improved knowledge of the species. 343 54%
P Change due to procedural changes. 16 3%
T Taxonomic change. 130 21%
Total - 626 100%

Next steps and strategic orientations

The vision of the Wild Species series is of a single platform for wild species assessment and monitoring: a tool that allows a wide variety of species from all regions of Canada to be ranked under the same system. This allows everyone from the resource manager to the high school student the ability to place a species in a geographic, taxonomic, and ecological context, and to gain an impression of the species’ general status in that context. The report Wild Species 2010 has contributed to this goal by increasing the number and variety of species assessed by the general status program, and by providing updated ranks for species first assessed in previous reports. However, the Wild Species series is a product of an ongoing, national program and the next report will aim to include an even broader diversity of species. Priorities for the future of the Wild Species series include:

There are many potential ways on how the Wild Species reports could be used. We present here five strategic orientations that identify the potential uses of the report:

The Wild Species series highlights both the wealth of knowledge we have about Canada’s wild species, and the information gaps that need to be filled. In the future, the Wild Species series will continue to consolidate our knowledge of wild species by using information from experts, both amateurs and professionals, to create a baseline for comparison of the status of Canada’s species. We hope that people will be encouraged by the release of these reports to contribute data on their own, or to become involved with general status assessments in their province or territory. If you want to help in the effort to collect information on Canada’s species, see Appendix 1.

Human impacts upon natural systems can be complex, subtle, and ongoing and large scale, long-term programs, like the Wild Species series, are essential in understanding exactly what these impacts are. Future reports will continue to require long hours from experts across the country, but this effort is a small price to pay to help sustain Canada’s majestic natural heritage.

Page details

Date modified: