Status of the Limber Pine (Pinus Flexilis)

Status of the Limber Pine (3LQXVÀH[LOLV) in Alberta

Alberta Wildlife Status Report No. 62 Status of the Limber Pine (3LQXVÀH[LOLV) in Alberta

Prepared for: Alberta Sustainable Resource Development (SRD) Alberta Conservation Association (ACA)

Prepared by: David W. Langor This report has been reviewed, revised, and edited prior to publication. It is an SRD/ACA working document that will be revised and updated periodically.

Alberta Wildlife Status Report No. 62

June 2007

Published By:

i Publication No. T/140 ISBN: 978-0-7785-6487-4 (Printed Edition) ISBN: 978-0-7785-6488-1 (On-line Edition) ISSN: 1206-4912 (Printed Edition) ISSN: 1499-4682 (On-line Edition)

Series Editors: Sue Peters, Robin Gutsell, Nyree Sharp and Lisa Matthias Illustrations: Brian Huffman Maps: Nicole Hopkins

For copies of this report, visit our web site at: KWWSVUGDOEHUWDFD¿VKZLOGOLIHVSHFLHVDWULVN and click on “Detailed Status”

OR

Contact: Information Centre - Publications Alberta Sustainable Resource Development Main Floor, Great West Life Building 9920 - 108 Street Edmonton, Alberta, Canada T5K 2M4

Telephone: (780) 422-2079

This publication may be cited as:

Alberta Sustainable Resource Development and Alberta Conservation Association. 2007. Status of the limber pine (3LQXVÀH[LOLV) in Alberta. Alberta Sustainable Resource Development, Wildlife Status Report No. 62, Edmonton, AB. 17 pp.

ii PREFACE

(YHU\¿YH\HDUVWKH)LVKDQG:LOGOLIH'LYLVLRQRI$OEHUWD6XVWDLQDEOH5HVRXUFH'HYHORSPHQW reviews the general status of wildlife species in Alberta. These overviews, which have been conducted in 1991 (The Status of Alberta Wildlife), 1996 (The Status of Alberta Wildlife), 2000 (The General Status of Alberta Wild Species 2000), and 2005 (The General Status of Alberta Wild Species 2005 DVVLJQLQGLYLGXDOVSHFLHV³UDQNV´WKDWUHÀHFWWKHSHUFHLYHGOHYHORIULVNWRSRSXODWLRQV that occur in the province. Such designations are determined from extensive consultations with professional and amateur biologists, and from a variety of readily available sources of population data. A key objective of these reviews is to identify species that may be considered for more detailed status determinations.

The Alberta Wildlife Status Report Series is an extension of the general status exercise, and provides comprehensive current summaries of the biological status of selected wildlife species in Alberta. Priority is given to species that are At Risk or May Be At Risk in the province, that are of uncertain status (Undetermined), or that are considered to be at risk at a national level by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC).

Reports in this series are published and distributed by the Alberta Conservation Association and the Fish and Wildlife Division of Alberta Sustainable Resource Development. They are intended to provide detailed and up-to-date information that will be useful to resource professionals for managing populations of species and their habitats in the province. The reports are also designed to provide current information that will assist Alberta’s Endangered Species Conservation Committee in identifying species that may be formally designated as Endangered or Threatened under Alberta’s Wildlife Act. To achieve these goals, the reports have been authored and/or reviewed by individuals with unique local expertise in the biology and management of each species.

iii EXECUTIVE SUMMARY

Limber pine (3LQXVÀH[LOLV) is distributed from southwestern Alberta and southeastern British Columbia to northern Arizona and New Mexico and southern California. In Alberta it exists in disjunct stands, and plans for the detailed mapping of the location and boundaries of limber pine stands are underway. This report summarizes existing information on limber pine in Alberta to assist in assessing its status in the province.

In Alberta, the species is found in montane and lower subalpine areas on xeric-to-subxeric, exposed and wind-swept sites. It is a pioneer species and colonizes disturbed sites, and thrives in harsh environments. Its seeds are dispersed mainly by Clark’s nutcracker (Nucifraga columbiana), and this mutualistic relationship is critical to the long-term viability of limber pine.

An invasive alien fungus, white pine blister rust (Cronartium ribicola), causes high mortality and is largely responsible for the decline of limber pine throughout most of its range in Alberta. High mortality coupled with often-poor regeneration provides a poor prognosis for limber pine.

iv ACKNOWLEDGEMENTS

The assistance of several people greatly aided the preparation of this report, and is gratefully acknowledged: Bev Wilson (Alberta Sustainable Resource Development, Forest Management Branch) provided data on the distribution of limber pine in Alberta; Cyndi Smith (Parks Canada, Waterton, AB) provided data on the distribution of limber pine and the impact of white pine blister rust in the national parks; Brian Klinkenberg (Department of Geography, University of British Columbia, Vancouver, BC) and Del Meidinger (B.C. Ministry of Forests and Range, Victoria, BC) provided distribution data for limber pine in BC; Roger Brett (Canadian Forest Service, Edmonton, AB) helped with production of maps; Ken Greenway (Alberta Sustainable Resource Development, Edmonton) provided information about regulations on harvesting of limber pine; and Dale Simpson (Canadian Forest Service, Fredericton, NB) provided information concerning optimal harvesting of limber pine cones. This report was greatly improved by comments made by Sue Peters (Alberta Conservation Association, Edmonton, AB) and Lisa Matthias (Alberta Sustainable Resource Development, Edmonton), Brendan Wilson (Selkirk College, Castlegar, BC), Peter Achuff (Parks Canada, Waterton) and Cyndi Smith.

Preparation of this report was funded by the Alberta Conservation Association and the Fish and Wildlife Division of Alberta Sustainable Resource Development.

v vi TABLE OF CONTENTS

PREFACE ...... iii

EXECUTIVE SUMMARY...... iv

ACKNOWLEDGEMENTS...... v

INTRODUCTION ...... 1

HABITAT...... 1

CONSERVATION BIOLOGY...... 2

DISTRIBUTION...... 4 1. Alberta...... 4 2. Other Areas ...... 6

POPULATION SIZE AND TRENDS ...... 6 1. Alberta...... 6 2. Other Areas ...... 8

LIMITING FACTORS...... 9 1. Insects and Diseases...... 9 2. Vertebrate Herbivores ...... 9 3. Cattle Grazing ...... 10 4. Seed Dispersal Agents...... 10 5. Climate Change...... 10  :LOG¿UH ...... 10

STATUS DESIGNATIONS ...... 10 1. Alberta...... 10 2. Other Areas ...... 10

RECENT MANAGEMENT IN ALBERTA...... 11

SYNTHESIS...... 11

LITERATURE CITED...... 12

$SSHQGL['H¿QLWLRQVRIVHOHFWHGOHJDODQGSURWHFWLYHGHVLJQDWLRQV ...... 16

vii LIST OF FIGURES

Figure 1 The distribution of limber pine in Alberta...... 5

Figure 2 The distribution of limber pine in North America...... 7

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 Figure 1: The distribution of limber pine in Alberta. Data at the “Limber pine research sites” were collected by the Canadian Forest Service (CFS; Edmonton) and Parks Canada (Waterton Lakes National Park; WLNP). “Other inventory data” includes the Alberta Vegetation Inventory and other polygons of inventory data collected by CFS.

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 Figure 2. The distribution of limber pine in North America [redrawn from Critchfield and Little (1966)].

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Cattle grazing. – Throughout the 6. Wildfi re. – Fire appears to be the Montane Subregion limber pine usually grows primary means of causing local extinction of in open stands on what are otherwise grasslands. limber pine, but it rarely does because trees Many of these stands are on private land that is are scattered and often found in areas where used for cattle ranching. As well, cattle grazing there is little fuel (Webster and Johnson 2000). leases are in effect for many parts of the Green Also, after a fi re, the Clark’s nutcracker quickly Zone, especially in the Porcupine Hills. As a uses burned sites for seed caching, thereby result, most limber pine stands in the Montane contributing to rapid regeneration (Webster and Subregion have regularly experienced cattle Johnson 2000). If anything, declining incidence grazing. Although there are no data to indicate of fi re as a result of effective fi re management that this grazing negatively affects limber pine, may be more of a limiting factor for limber pine. it is possible that regeneration may be affected. Fire can benefi t limber pine in mixed stands This is a potential limiting factor that requires by setting back succession, thereby favouring further study. early colonizers such as limber pine. If wildfi res become more frequent and extensive as a result 4. Seed dispersal agents. – The heavy of climate change, limber pine may benefi t, but reliance of limber pine upon Clark’s nutcracker only if the fi re return interval is longer than the for long distance seed dispersal and for age of limber pine reproductive maturity, and colonization of newly disturbed sites means if the size of burned areas is suffi ciently small that the viability of limber pine is tightly linked to be fully utilized for seed caching by Clark’s to the viability of the nutcracker (Blouin 2004). nutcracker. In 2005, the general status of Clark’s nutcracker in Alberta was ranked as Sensitive (up from STATUS DESIGNATIONS* Secure in 2000), because of its dependency on declining species such as limber pine and 1. Alberta. – Limber pine is not listed under whitebark pine (Alberta Sustainable Resource Alberta’s Wildlife Act. The Alberta Natural Development 2007). It may also be susceptible Heritage Information Centre (ANHIC) ranks to the West Nile virus (Blouin 2004). limber pine as S2 (Gould 2006). Beardmore et al. (2006) lists limber pine as a species that is 5. Climate change. – As limber pine is in need of conservation in Canada. The general very tolerant of dry conditions and has evolved status of limber pine is May Be At Risk because to persist in harsh habitats, it may be expected of extensive mortality from white-pine blister that increased temperatures and decreased rust within parts of its Alberta range, as well moisture associated with climate change will as additional mortality and risk from mountain not affect limber pine as much as other less pine beetle outbreaks (Alberta Sustainable tolerant tree species inhabiting the montane Resource Development 2007). areas of southwestern Alberta. It also may be that the lowered ability of some tree species 2. Other Areas. – The global status for to grow under climate change scenarios may limber pine is G5, and the status was last increase the temporal persistence of limber pine reviewed in October 1984 (NatureServe 2006). by slowing or eliminating succession. Overall, The national status for limber pine in Canada it may be expected that climate change may is N3/N4, and in the United States is N5 promote geographic range extension of limber (NatureServe 2006). Beardmore et al. (2006) pine; however, this may be offset by the impact lists limber pine as a species that is in need of of other limiting factors.

* See Appendix 1 for defi nitions of selected status designations.

10 conservation in Canada. In British Columbia, tens of thousands. However, the signifi cant limber pine is ranked S3/S4 and the list status and growing mortality caused by WPBR, is yellow, which means that the species is commonly coupled with poor regeneration, has apparently secure and not at risk of extinction caused a steep downward trend in many (and (B.C. Conservation Data Centre 2006). In the probably most) limber pine stands in Alberta. United States, limber pine is ranked S1 in The fact that WPBR is present in almost all South Dakota, North Dakota and Nebraska, S4 stands of limber pine means that the severe in Oregon, and S5 in Wyoming; the other states impacts already observed in the southern half in which limber pine occurs have not ranked of the range of limber pine in Alberta will the species (NatureServe 2006). likely eventually be experienced throughout the range. Monitoring of limber pine health RECENT MANAGEMENT IN ALBERTA should be periodically implemented to assess trends and rates of change. In Alberta there are no regulations against harvesting of limber pine (K. Greenway, pers. The apparent association of low regeneration of Comm.). In WLNP, an experiment was recently limber pine with severe WPBR incidence needs initiated to assess the survival of limber pine detailed investigation to ascertain whether this is seeds and seedlings (Poll et al. 2006). a cause-effect relationship. As the most severely infected stands occur mainly in montane areas SYNTHESIS where cattle are often present in limber pine stands, it is hypothesized that grazing activity Assessment of the status of limber pine is also linked to poor regeneration success. requires detailed information on its distribution and population levels. Although the general Understanding of the genetic structure of limber distribution of limber pine in Alberta is known, pine in Alberta will provide some guidance the boundaries of the many disjunct stands have for management. Identifi cation of genetically not been mapped. As well, tree densities have unique populations can identify priorities for not been estimated for most regions of Alberta. application of conservation measures and can Future work should be focused on delimiting direct seed collection for in vitro conservation. limber pine distribution and estimating Ongoing genetics work will contribute towards population sizes. this, but this work will have to be expanded to include more disjunct northern populations that Limber pine still exists in many stands in Alberta, have the highest probability of having a unique and its numbers can likely be measured in the genetic profi le.

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 Appendix 1.'H¿QLWLRQVRIVHOHFWHGOHJDODQGSURWHFWLYHGHVLJQDWLRQV

A. The General Status of Alberta Wild Species 2005 after Alberta Sustainable Resource Development 2007

2005 Rank 1996 Rank 'H¿QLWLRQV $W5LVN Red $Q\VSHFLHVNQRZQWREHAt Risk after formal detailed status assessment and designation as Endangered or Threatened in $OEHUWD 0D\%H$W5LVN %OXH $Q\VSHFLHVWKDWPD\EHDWULVNRIH[WLQFWLRQRUH[WLUSDWLRQDQGLV WKHUHIRUHDFDQGLGDWHIRUGHWDLOHGULVNDVVHVVPHQW Sensitive

([RWLF$OLHQ QD $Q\VSHFLHVWKDWKDVEHHQLQWURGXFHGDVDUHVXOWRIKXPDQDFWLYLWLHV ([WLUSDWHG([WLQFW QD $Q\VSHFLHVQRORQJHUWKRXJKWWREHSUHVHQWLQ$OEHUWD Extirpated) RUQRORQJHUEHOLHYHGWREHSUHVHQWDQ\ZKHUHLQWKHZRUOG Extinct  $FFLGHQWDO9DJUDQW QD $Q\VSHFLHVRFFXUULQJLQIUHTXHQWO\DQGXQSUHGLFWDEO\LQ$OEHUWD LHRXWVLGHLWVXVXDOUDQJH

B. Alberta Wildlife Act/Regulation 6SHFLHVGHVLJQDWHGDV(QGDQJHUHGXQGHU$OEHUWD¶VWildlife Act include those listed as Endangered or Threatened in the :LOGOLIH5HJXODWLRQ

Endangered $VSHFLHVZKRVHSUHVHQWH[LVWHQFHLQ$OEHUWDLVLQGDQJHURIH[WLQFWLRQZLWKLQWKHQH[W GHFDGH 7KUHDWHQHG $VSHFLHVWKDWLVOLNHO\WREHFRPHHQGDQJHUHGLIWKHIDFWRUVFDXVLQJLWVYXOQHUDELOLW\ DUHQRWUHYHUVHG

C. Committee on the Status of Endangered Wildlife in Canada (after COSEWIC 2006)

([WLQFW $VSHFLHVWKDWQRORQJHUH[LVWV ([WLUSDWHG $VSHFLHVWKDWQRORQJHUH[LVWVLQWKHZLOGLQ&DQDGDEXWRFFXUVHOVHZKHUH Endangered $VSHFLHVIDFLQJLPPLQHQWH[WLUSDWLRQRUH[WLQFWLRQ 7KUHDWHQHG $VSHFLHVWKDWLVOLNHO\WREHFRPHHQGDQJHUHGLIOLPLWLQJIDFWRUVDUHQRWUHYHUVHG Special Concern $VSHFLHVWKDWPD\EHFRPHWKUHDWHQHGRUHQGDQJHUHGEHFDXVHRIDFRPELQDWLRQRI ELRORJLFDOFKDUDFWHULVWLFVDQGLGHQWL¿HGWKUHDWV 1RWDW5LVN $VSHFLHVWKDWKDVEHHQHYDOXDWHGDQGIRXQGWREHQRWDWULVNJLYHQFXUUHQW FLUFXPVWDQFHV 'DWD'H¿FLHQW $category that applies when the available information is insufficient to a) resolve a  species' eligiblity for DVVHVVPHQWor b) permit assessment of a species/ risk of extinction

16 Appendix 1FRQWLQXHG

D. Heritage Status Ranks: Global (G), National (N), Sub-National (S) DIWHU$OEHUWD1DWXUDO+HULWDJH,QIRUPDWLRQ &HQWUH61DWXUH6HUYH6

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E. United States Endangered Species Act DIWHU1DWLRQDO5HVHDUFK&RXQFLO

Endangered $Q\VSHFLHVZKLFKLVLQGDQJHURIH[WLQFWLRQWKURXJKRXWDOORUDVLJQL¿FDQWSRUWLRQRI LWVUDQJH 7KUHDWHQHG $Q\VSHFLHVZKLFKLVOLNHO\WREHFRPHDQHQGDQJHUHGVSHFLHVZLWKLQWKHIRUHVHHDEOH IXWXUHWKURXJKRXWDOORUDVLJQL¿FDQWSRUWLRQRILWVUDQJH

17 List of Titles in This Series (as of June 2007)

No. 1 Status of the Piping Plover (Charadrius melodus) in Alberta, by David R. C. Prescott. 19 pp. (1997)

No. 2 Status of the Wolverine (Gulo gulo) in Alberta, by Stephen Petersen. 17 pp. (1997)

No. 3 Status of the Northern Long-eared Bat (Myotis septentrionalis) in Alberta, by M. Carolina Caceres and M. J. Pybus. 19 pp. (1997)

No. 4 Status of the Ord’s Kangaroo Rat (Dipodomys ordii) in Alberta, by David L. Gummer. 16 pp. (1997)

No. 5 Status of the Eastern Short-horned Lizard (Phrynosoma douglassii brevirostre) in Alberta, by Janice D. James, Anthony P. Russell and G. Lawrence Powell. 20 pp. (1997)

No. 5 Update 2004. Status of the Short-horned Lizard (Phrynosoma hernandesi) in Alberta. Alberta Sustainable Resource Development. 27 pp. (2004)

No. 6 Status of the Prairie Rattlesnake (Crotalus viridis viridis) in Alberta, by Sheri M. Watson and Anthony P. Russell. 26 pp. (1997)

No. 7 Status of the Swift Fox (Vulpes velox) in Alberta, by Susan E. Cotterill. 17 pp. (1997)

No. 8 Status of the Peregrine Falcon (Falco peregrinus anatum) in Alberta, by Petra Rowell and David P. Stepnisky. 23 pp. (1997)

No. 9 Status of the Northern Leopard Frog (Rana pipiens) in Alberta, by Greg Wagner. 46 pp. (1997)

No. 9 Update 2003. Status of the Northern Leopard Frog (Rana pipiens) in Alberta. Alberta Sustainable Resource Development. 61 pp. (2003)

No. 10 Status of the Sprague’s Pipit (Anthus spragueii) in Alberta, by David R. C. Prescott. 14 pp. (1997)

No. 11 Status of the Burrowing Owl (Speotyto cunicularia hypugaea) in Alberta, by Troy I. Wellicome. 21 pp. (1997)

No. 11 Update 2005. Status of the Burrowing Owl (Athene cunicularia) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 28 pp. (2005)

No. 12 Status of the Canadian Toad (Bufo hemiophrys) in Alberta, by Ian M. Hamilton, Joann L. Skilnick, Howard Troughton, Anthony P. Russell, and G. Lawrence Powell. 30 pp. (1998)

No. 13 Status of the Sage Grouse (Centrocercus urophasianus urophasianus) in Alberta, by Cameron L. Aldridge. 23 pp. (1998)

No. 14 Status of the Great Plains Toad (Bufo cognatus) in Alberta, by Janice D. James. 26 pp. (1998)

No. 15 Status of the Plains Hognose Snake (Heterodon nasicus nasicus) in Alberta, by Jonathan Wright and Andrew Didiuk. 26 pp. (1998)

No. 16 Status of the Long-billed Curlew (Numenius americanus) in Alberta, by Dorothy P. Hill. 20 pp. (1998)

No. 17 Status of the Columbia Spotted Frog (Rana luteiventris) in Alberta, by Janice D. James. 21 pp. (1998) No. 18 Status of the Ferruginous Hawk (Buteo regalis) in Alberta, by Josef K. Schmutz. 18 pp. (1999)

No. 18 Update 2006. Status of the Ferruginous Hawk (Buteo regalis) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 22 pp. (2006)

No. 19 Status of the Red-tailed Chipmunk (7DPLDVUX¿FDXGXV) in Alberta, by Ron Bennett. 15 pp. (1999)

No. 20 Status of the Northern Pygmy Owl (Glaucidium gnoma californicum) in Alberta, by Kevin C. Hannah. 20 pp. (1999)

No. 21 Status of the Western Blue Flag (Iris missouriensis) in Alberta, by Joyce Gould. 22 pp. (1999)

No. 21 Update 2005. Status of the Western Blue Flag (Iris missouriensis) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 29 pp. (2005)

No. 22 Status of the Long-toed Salamander (Ambystoma macrodactylum) in Alberta, by Karen L. Graham and G. Lawrence Powell. 19 pp. (1999)

No. 23 Status of the Black-throated Green Warbler (Dendroica virens) in Alberta, by Michael R. Norton. 24 pp. (1999)

No. 24 Status of the Loggerhead Shrike (Lanius ludovicianus) in Alberta, by David R. C. Prescott and Ronald R. Bjorge. 28 pp. (1999)

No. 25 Status of the Plains Spadefoot (Spea bombifrons) in Alberta, by Richard D. Lauzon. 17 pp. (1999)

No. 26 Status of the Trumpeter Swan (Cygnus buccinator) in Alberta, by M. Lynne James. 21 pp. (2000)

1R 6WDWXVRIWKH3\JP\:KLWH¿VK Prosopium coulteri) in Alberta, by William C. Mackay. 16 pp. (2000)

No. 28 Status of the Short-eared Owl ($VLRÀDPPHXV) in Alberta, by Kort M. Clayton. 15 pp. (2000)

No. 29 Status of the Willow Flycatcher (Empidonax traillii) in Alberta, by Bryan Kulba and W. Bruce McGillivray. 15 pp. (2001)

No. 30 Status of the Woodland Caribou (Rangifer tarandus caribou) in Alberta, by Elston Dzus. 47 pp. (2001)

No. 31 Status of the Western Spiderwort (Tradescantia occidentalis) in Alberta, by Bonnie Smith. 12 pp. (2001)

No. 32 Status of the Bay-breasted Warbler (Dendroica castanea) in Alberta, by Michael Norton. 21 pp. (2001)

No. 33 Status of the Cape May Warbler (Dendroica tigrina) in Alberta, by Michael Norton. 20 pp. (2001)

No. 34 Status of the Whooping Crane (Grus americana) in Alberta, by Jennifer L. White. 21 pp. (2001)

No. 35 Status of Soapweed (Yucca glauca) in Alberta, by Donna Hurlburt. 18 pp. (2001)

No. 36 Status of the Harlequin Duck (Histrionicus histrionicus) in Alberta, by Beth MacCallum. 38 pp. (2001)

No. 37 Status of the Grizzly Bear (Ursus arctos) in Alberta, by John L. Kansas. 43 pp. (2002)

No. 38 Status of the Wood Bison (Bison bison athabascae) in Alberta, by Jonathan A. Mitchell and C. Cormack Gates. 32 pp. (2002) No. 39 Status of the Bull Trout (6DOYHOLQXVFRQÀXHQWXV) in Alberta, by John R. Post and Fiona D. Johnston. 40 pp. (2002)

No. 40 Status of the Banff Springs Snail (Physella johnsoni) in Alberta, by Dwayne A.W. Lepitzki. 29 pp. (2002)

No. 41 Status of the Shortjaw Cisco (Coregonus zenithicus) in Alberta, by Mark Steinhilber. 23 pp. (2002)

No. 42 Status of the Prairie Falcon (Falco mexicanus) in Alberta, by Dale Paton. 28 pp. (2002)

No. 43 Status of the American Badger (Taxidea taxus) in Alberta, by Dave Scobie. 17 pp. (2002)

No. 44 Status of the Yucca Moth (Tegeticula yuccasella) in Alberta. Alberta Sustainable Resource Development. 21 pp. (2002)

No. 45 Status of the White-winged Scoter (Melanitta fusca deglandi) in Alberta. Alberta Sustainable Resource Development. 15 pp. (2002)

No. 46 Status of the Lake Sturgeon (Acipenser fulvescens) in Alberta. Alberta Sustainable Resource Development. 30 pp. (2002)

No. 47 Status of the Western Silvery Minnow (Hybognathus argyritis) in Alberta. Alberta Sustainable Resource Development. 24 pp. (2003)

1R 6WDWXVRIWKH6PDOOÀRZHUHG6DQG9HUEHQD Tripterocalyx micranthus) in Alberta. Alberta Sustainable Resource Development. 24 pp. (2003)

No. 49 Status of the Brown Creeper (Certhia americana) in Alberta. Alberta Sustainable Resource Development. 30 pp. (2003)

No. 50 Status of the Mountain Plover (Charadrius montanus) in Alberta. Alberta Sustainable Resource Development. 25 pp. (2003)

No. 51 Status of the St. Mary Shorthead Sculpin (provisionally Cottus bairdi punctulatus) in Alberta. Alberta Sustainable Resource Development. 24 pp. (2003)

No. 52 Status of the Stonecat (1RWXUXVÀDYXV) in Alberta. Alberta Sustainable Resource Development. 22 pp. (2003)

No. 53 Status of the Sage Thrasher (Oreoscoptes montanus) in Alberta. Alberta Sustainable Resource Development. 23 pp. (2004)

No. 54 Status of the Tiny Cryptanthe (Cryptantha minima) in Alberta. Alberta Sustainable Resource Development. 39 pp. (2004)

No. 55 Status of the Slender Mouse-ear-cress (Halimolobos virgata) in Alberta. Alberta Sustainable Resource Development. 27 pp. (2005)

No. 56 Status of the Barred Owl (Strix varia) in Alberta. Alberta Sustainable Resource Development. 15 pp. (2005)

No. 57 Status of the Arctic Grayling (Thymallus arcticus) in Alberta. Alberta Sustainable Resource Development. 41 pp. (2005)

No. 58 Status of the Weidemeyer’s Admiral (Limenitis weidemeyerii) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 13 pp. (2005) No. 59 Status of the Porsild’s Bryum (Bryum porsildii) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 30 pp. (2006)

No. 60 Status of the Western Grebe (Aechmophorus occidentalis) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 29 pp. (2006)

No. 61 Status of the Westslope Cutthroat Trout (Oncorhynchus clarkii lewisii) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 34 pp. (2006)

No. 62 Status of the Limber Pine (3LQXVÀH[LOLV) in Alberta. Alberta Sustainable Resource Development and Alberta Conservation Association. 17 pp. (2007)