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RESEARCH ARTICLE
Contents Vol 51(12)

Influence of stand thinning on wildlife in managed second-growth forests: tree squirrels, small mustelids, and mammalian species richness

Thomas P. Sullivan https://orcid.org/0000-0002-9811-1504 A * and Druscilla S. Sullivan B
+ Author Affiliations
- Author Affiliations

A Department of Forest and Conservation Sciences, Faculty of Forestry, University of B.C., 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada.

B Applied Mammal Research Institute, 11010 Mitchell Avenue, Summerland, BC V0H 1Z8, Canada.

* Correspondence to: tom.sullivan@ubc.ca

Handling Editor: Pablo Ferreras

Wildlife Research 51, WR24063 https://doi.org/10.1071/WR24063
Submitted: 17 April 2024  Accepted: 5 November 2024  Published: 26 November 2024

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context

Clearcutting of forests reduces food, cover, and stand structure attributes for tree squirrels (Tamiasciurus hudsonicus, Glaucomys sabrinus), small mustelids (Mustela richardsonii, Neogale frenata), and other mammal species. Forest restoration is urgently needed and stand thinning of second-growth forests may help restore habitats for mammals.

Aims

We tested the hypotheses that in thinned stands of second-growth lodgepole pine (Pinus contorta var. latifolia) at 30–36 years post-thinning: (H1) tree dimensions would be comparable to, or higher than those in uncut old-growth forest; activity of tree squirrels, weasels, and mammalian species richness would be higher in (H2) heavily thinned than lightly thinned stands, and (H3) higher in uncut old-growth forest than in second-growth thinned stands.

Methods

We measured stand structure attributes and activity of tree squirrels, weasels, and mammalian species richness with camera traps from 2021 to 2023 in replicated (n = 3) treatments of three densities of thinned pine stands and uncut old-growth forest in south-central British Columbia (BC), Canada.

Key results

Thinned and old-growth stands had mean tree diameters ranging from 18 to 22 cm, but mean tree heights were highest in the old-growth stands. Low-density stands tended to have large diameter crop trees with substantial crowns. There was no evidence for a difference in mean activity of T. hudsonicus and G. sabrinus, other common mammal species, and overall species richness among stands. There were more weasel detections per camera-day in the low-density and old-growth stands than other thinned stands.

Conclusions

Comparison of stand structure attributes showed partial support for H1. There was insufficient evidence to detect biologically meaningful effects among stands in a mean index of activity for T. hudsonicus, G. sabrinus, other common mammal species, and overall species richness, and hence did not support H2 or H3. There was weak support for H2 and H3 with limited weasel activity.

Implications

Thinned second-growth stands ≤1000 stems/ha may provide habitat at least for the mammal species and post-treatment period outlined in this study. To our knowledge, this is the first convergence of managed coniferous stands (age 43 years) with old-growth forest (age 140–187 years) in terms of some components of stand structure and mammalian species richness.

Keywords: coniferous forests, Glaucomys sabrinus, lodgepole pine, mammalian species richness, managed second-growth stands, old-growth forest, Tamiasciurus hudsonicus, weasels.

References

Allen CD, Macalady AK, Chenchouni H, et al. (2010) A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forests. Forest Ecology and Management 259, 660-684.
| Crossref | Google Scholar |

Amaranthus M, Trappe JM, Bednar L, Arthur D (1994) Hypogeal fungal production in mature Douglas-fir forest fragments and surrounding plantations and its relation to coarse woody debris and animal mycophagy. Canadian Journal of Forest Research 24, 2157-2165.
| Crossref | Google Scholar |

Andren H, Lemnell PA (1992) Population fluctuations and habitat selection in the Eurasian red squirrel Sciurus vulgaris. Ecography 15, 303-307.
| Google Scholar |

Bauhus J, Puettman K, Messier C (2009) Silviculture for old-growth attributes. Forest Ecology and Management 258, 525-537.
| Crossref | Google Scholar |

Bayne E, Hobson K (2000) Relative use of contiguous and fragmented boreal forest by red squirrels (Tamiasciurus hudsonicus). Canadian Journal of Zoology 78, 359-365.
| Crossref | Google Scholar |

Boutin S, Krebs CJ, Boonstra R, Sinclair ARE (2003) The role of the lynx–hare cycle in boreal forest community dynamics. In ‘Mammal community dynamics: management and conservation in the coniferous forest of western North America’. (Eds CJ Zabel, RG Anthony) pp. 487–509. (Cambridge University Press: Cambridge, UK)

British Columbia Ministry of Forests (2022) Seed Centre Annual Report. Forest Improvement and Research Management Branch, Victoria, BC, Canada.

Burton PJ, Balisky AC, Coward LP, Cumming SG, Kneeshaw DD (1992) The value of managing for biodiversity. The Forestry Chronicle 68, 225-237.
| Crossref | Google Scholar |

Burton AC, Neilson E, Moreira D, et al. (2015) REVIEW: Wildlife camera trapping: a review and recommendations for linking surveys to ecological processes. Journal of Applied Ecology 52, 675-685.
| Crossref | Google Scholar |

Buskirk SW, Zielinski WJ (2003) Small and mid-sized carnivores. In ‘Mammal community dynamics: management and conservation in the Coniferous Forests of Western North America’. (Eds CJ Zabel, RG Anthony) pp. 207–249. (Cambridge University Press: Cambridge, UK)

Buskirk SW, Forrest SC, Raphael MG, Harlow HJ (1989) Winter resting site ecology of marten in the central Rocky Mountains. Journal of Wildlife Management 53, 191-196.
| Crossref | Google Scholar |

Carey AB (2000) Effects of new forest management strategies on squirrel populations. Ecological Applications 10, 248-257.
| Crossref | Google Scholar |

Carey AB, Wilson SM (2001) Induced spatial heterogeneity in forest canopies: responses of small mammals. Journal of Wildlife Management 65, 1014-1027.
| Crossref | Google Scholar |

Carey AB, Kershner J, Biswell B, Dominguez de Toledo LS (1999) Ecological scale and forest development: squirrels, dietary fungi, and vascular plants in managed and unmanaged forests. Wildlife Monographs 142, 1-71.
| Google Scholar |

Ćosović M, Bugalho MN, Thom D, Borges JG (2020) Stand structural characteristics are the most practical biodiversity indicators for forest management planning in Europe. Forests 11, 343,.
| Crossref | Google Scholar |

Côté M, Ferron J (2001) Short-term use of different residual forest structures by three sciurid species in a clear-cut boreal landscape. Canadian Journal of Forest Research 31, 1805-1815.
| Crossref | Google Scholar |

Croose E, Hannify R, Hughes B, McAney K, MacPherson J, Carter SP (2022) Assessing the detectability of the Irish stoat Mustela erminea hibernica using two camera trap-based survey methods. Mammal Research 67, 1-8.
| Crossref | Google Scholar |

Dhar A, Parrott L, Hawkins CDB (2016) Aftermath of mountain pine beetle outbreak in British Columbia: stand dynamics, management response and ecosystem resilience. Forests 7, 171.
| Crossref | Google Scholar |

Edelman AJ, Koprowski JL, Edelman JL (2005) Kleptoparasitic behavior and species richness at Mt. Graham red squirrel middens. USDA Forest Service Proceedings.; RMRS-P-36. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fort Collins, CO, USA. pp. 395–398.

Englund SR, O’Brien JJ, Clark DB (2000) Evaluation of digital and film hemispherical photography and spherical densiometry for measuring forest light environments. Canadian Journal of Forest Research 30, 1999-2005.
| Crossref | Google Scholar |

Evans BE, Mortelliti A (2022) Forest disturbance and occupancy patterns of American ermine (Mustela richardsonii) and long-tailed weasel (Neogale frenata): results from a large-scale natural experiment in Maine, United States. Journal of Mammalogy 103, 1338-1349.
| Crossref | Google Scholar |

Fauteux D, Cheveau M, Imbeau L, Drapeau P (2015) Cyclic dynamics of a boreal southern red-backed vole population in northwestern Quebec. Journal of Mammalogy 96, 573-578.
| Crossref | Google Scholar |

Fisher JT, Wilkinson L (2005) The response of mammals to forest fire and timber harvest in the North American boreal forest. Mammal Review 35, 51-81.
| Crossref | Google Scholar |

Fletcher QE, Boutin S, Lane JE, LaMontagne JM, McAdam AG, Speakman JR, Krebs CJ, Humphries MM (2010) The functional response of a hoarding seed predator to mast seeding. Ecology 91, 2673-2683.
| Crossref | Google Scholar | PubMed |

Franklin JF, Spies TA, Pelt RV, et al. (2002) Disturbances and structural development of natural forest ecosystems with silvicultural implications, using Douglas-fir forests as an example. Forest Ecology and Management 155, 399-423.
| Crossref | Google Scholar |

Gomez DM, Anthony RG, Hayes JP (2005) Influence of thinning of Douglas-fir forests on population parameters and diet of northern flying squirrels. Journal of Wildlife Management 69, 1670-1682.
| Crossref | Google Scholar |

Gurnell J (1984) Home range, territoriality, caching behaviour and food supply of the red squirrel (Tamiasciurus hudsonicus fremonti) in a subalpine lodgepole pine forest. Animal Behaviour 32, 1119-1131.
| Crossref | Google Scholar |

Gurnell J (1987) ‘The natural history of squirrels.’ (Christopher Helm: London)

Hodges KE (2000) Ecology of snowshoe hares in southern boreal and montane forests. In ‘Ecology and conservation of the lynx in the United Stages’. (Eds LF Ruggiero, KB Aubry, SW Buskirk, GM Koehler, CJ Krebs, KS Mckelvey, JR Squires) pp. 163–206. (University Press of Colorado, Boulder, Colorado, USA)

Holloway GL, Malcolm JR (2006) Sciurid habitat relationships in forests managed under selection and shelterwood silviculture in Ontario. Journal of Wildlife Management 70, 1735-1745.
| Crossref | Google Scholar |

Holloway GL, Smith WP (2011) A meta-analysis of forest age and structure effects on northern flying squirrel densities. Journal of Wildlife Management 75, 668-674.
| Crossref | Google Scholar |

Homyack JA, Harrison DJ, Krohn WB (2004) Structural differences between precommercially thinned and unthinned conifer stands. Forest Ecology and Management 194, 131-143.
| Crossref | Google Scholar |

IBM Corp. (2021) IBM SPSS ‘Statistics for Windows’ Version 28.0. (IBM Corp, Armonk, NY)

Johnson DR, Swanson BJ, Eger JL (2000) Cyclic dynamics of eastern Canadian ermine populations. Canadian Journal of Zoology 78, 835-839.
| Crossref | Google Scholar |

Kautz TM, Beyer DE, Farley Z, et al. (2021) American martens use vigilance and short-term avoidance to navigate a landscape of fear from fishers at artificial scavenging sites. Nature Science Reports 11, 12146.
| Crossref | Google Scholar |

Kelly AJ, Hodges KE (2020) Post-fire salvage logging reduces snowshoe hare and red squirrel densities in early seral stages. Forest Ecology and Management 473, 118272.
| Crossref | Google Scholar |

Kemp GA, Keith LB (1970) Dynamics and regulation of red squirrel (Tamiasciurus hudsonicus) populations. Ecology 51, 763-779.
| Crossref | Google Scholar |

Kenney AJ, Boutin S, Jung TS, Murray DL, Johnson N, Krebs CJ (2024) Motion-sensitive cameras track population abundance changes in a boreal community in southwestern Yukon, Canada. Journal of Wildlife Management 88, e22564.
| Crossref | Google Scholar |

King CM, Powell RA, Powell C (2007) ‘The natural history of weasels and stoats. ecology, behavior, management.’ (Oxford University Press: NY, USA)

Kolowski JM, Forrester TD (2017) Camera trap placement and the potential for bias due to trails and other features. PLoS ONE 12(10), e0186679.
| Crossref | Google Scholar | PubMed |

Krebs CJ (1999) ‘Ecological methodology.’ (Addison Wesley Longman, Inc.: USA)

Lindenmayer DB, Burton PJ, Franklin JF (2008) ‘Salvage logging and its ecological consequences.’ (Island Press: Washington, DC, USA)

Lindgren PMF, Sullivan TP (2013) Long-term responses of tree and stand growth of young lodgepole pine to pre-commercial thinning and repeated fertilization. Forest Ecology and Management 307, 155-164.
| Crossref | Google Scholar |

Linnell MA, Epps CW, Forsman ED, Zielinski WJ (2017) Survival and predation of weasels (Mustela erminea, Mustela frenata) in North America. Northwest Science 91, 15-26.
| Crossref | Google Scholar |

Litvaitis JA, Shelburne JA, Bissonette JA (1985) Influence of understory characteristics on snowshoe hare habitat use and density. Journal of Wildlife Management 49, 866-873.
| Crossref | Google Scholar |

Lobo N, Millar JS (2011) The efficacy of conifer seeds as major food resources to deer mice (Peromyscus maniculatus) and southern red-backed voles (Myodes gapperi). Mammalian Biology 76, 274-284.
| Crossref | Google Scholar |

Manning T, Hagar JC, McComb BC (2012) Thinning of young Douglas-fir forests decreases density of northern flying squirrels in the Oregon Cascades. Forest Ecology and Management 264, 115-124.
| Crossref | Google Scholar |

Martin SK (1994) Feeding ecology of American martens and fishers. In ‘Martens, Sables, and Fishers. Biology and Conservation’. (Eds WW Buskirk, AS Harestad, MG Raphael, RA Powell) pp. 297–315. (Comstock Publishing Associates, Cornell University Press, Ithaca, NY, USA)

Maser C, Claridge AW, Trappe JM (2008) ‘Trees, truffles, and beasts: how forests function.’ (Rutgers University Press: Piscataway, NJ, USA)

Matsuoka SM, Handel CM, Ruthrauff DR (2001) Densities of breeding birds and changes in vegetation in an Alaskan boreal forest following a massive disturbance by spruce beetles. Canadian Journal of Zoology 79, 1678-1690.
| Crossref | Google Scholar |

McElhinny C, Gibbons P, Brack C, Bauhus J (2005) Forest and woodland stand structural complexity: its definition and measurement. Forest Ecology and Management 218, 1-24.
| Crossref | Google Scholar |

Meidinger D, Pojar J (1991) ‘Ecosystems of British Columbia.’ Special Report Series No. 6. (Research Branch, Ministry of Forests, Victoria, BC).

Mos J, Hofmeester TR (2020) The Mostela: an adjusted camera trapping device as a promising non-invasive tool to study and monitor small mustelids. Mammal Research 65, 843-853.
| Crossref | Google Scholar |

Newton M, Cole L (2015) Overstory development in Douglas-fir-dominant forests thinned to enhance late-seral features. Forest Science 61, 809-816.
| Crossref | Google Scholar |

Pearson DE (1999) Small mammals of the Bitterroot National Forest: habitat associations, ecological interactions, and implications for forest management’. U.S. Forest Service General Technical Report RMRS-GTR-25. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Ogden, UT.

Pearson DE, Ruggiero LF (2001) Test of the prey-base hypothesis to explain use of red squirrel midden sites by American martens. Canadian Journal of Zoology 79, 1372-1379.
| Crossref | Google Scholar |

Pietz PJ, Tester JR (1983) Habitat selection by snowshoe hares in north central Minnesota. Journal of Wildlife Management 47, 686-696.
| Crossref | Google Scholar |

Posthumous EE, Koprowski JL, Steidl RJ (2015) Red squirrel middens influence abundance but not diversity of other vertebrates. PLoS ONE 10(4), e0123633.
| Crossref | Google Scholar |

Pritchard SJ, Stevens-Rumann CS, Hessburg PF (2017) Shifting global fire regimes: lessons from reburns and research needs. Forest Ecology and Management 396, 217-233.
| Crossref | Google Scholar |

Ransome DB, Sullivan TP (2003) Population dynamics of Glaucomys sabrinus and Tamiasciurus douglasii in old-growth and second-growth stands of coastal coniferous forest. Canadian Journal of Forest Research 33, 587-596.
| Crossref | Google Scholar |

Ransome DB, Lindgren PMF, Sullivan DS, Sullivan TP (2004) Long-term responses of ecosystem components to stand thinning in young lodgepole pine forest. I. Population dynamics of northern flying squirrels and red squirrels. Forest Ecology and Management 202, 355-367.
| Crossref | Google Scholar |

Rusch DA, Reeder WG (1978) Population ecology of Alberta red squirrels. Ecology 59, 400-420.
| Crossref | Google Scholar |

Saab VA, Latif QS, Rowland MM, Johnson TN, Chalfoun AD, Buskirk SW, Heyward JE, Dresser MA (2014) Ecological consequences of mountain pine beetle outbreaks for wildlife in western North American forests. ForestScience 60, 539-559.
| Crossref | Google Scholar |

Schmidt WC, Seidel KW (1988) Western larch and space: thinning to optimize growth. In ‘Proceedings – Future forests of the mountain west: a stand culture symposium’, 29 September−3 October 1986, Missoula, MT, Gen. Tech. Rep. INT-243. U.S. Department of Agriculture, Forest Service, Intermountain Research Station, Ogden, UT. pp. 87–92.

Seip CR, Hodder DP, Crowley SM, Johnson CJ (2018) Use of constructed woody debris corridors in a clearcut by American martens (Martes americana) and their prey. Forestry 91, 506-513.
| Crossref | Google Scholar |

Sherburne SS, Bissonette JA (1993) Squirrel middens influence marten (Martes americana) use of subnivean access points. American Midland Naturalist 129, 204-207.
| Crossref | Google Scholar |

Simms DA (1979) North American weasels: resource utilization and distribution. Canadian Journal of Zoology 57, 504-520.
| Crossref | Google Scholar |

Smith WP, Anthony RG, Waters JR, Dodd NL, Zabel CJ (2003) Ecology and conservation of arboreal rodents of western coniferous forests. In ‘Mammal community dynamics: management and conservation in forests of western North America’ (Eds CJ Zabel, RG Anthony) pp. 157–206. (Cambridge University Press: Cambridge, UK)

Steele MA (1998) Tamiasciurus hudsonicus. Mammalian Species 586, 1-9.
| Google Scholar |

Steidl RJ, Hayes JP, Schauber E (1997) Statistical power analysis in wildlife research. Journal of Wildlife Management 61, 270-279.
| Crossref | Google Scholar |

Steventon JD (2015) Arboreal squirrel abundance in response to a gradient of mountain pine beetle attack in sub-boreal forests. Journal of Ecosystems and Management 15, 1-12.
| Crossref | Google Scholar |

Sullivan TP, Sullivan DS, Lindgren PMF, Ransome DB (2005) Long-term responses of ecosystem components to stand thinning in young lodgepole pine forest: II. Diversity and population dynamics of forest floor small mammals. Forest Ecology and Management 205, 1-14.
| Crossref | Google Scholar |

Sullivan TP, Sullivan DS, Lindgren PMF (2012) Influence of repeated fertilization and cattle grazing on forest ecosystems: abundance and diversity of forest-floor small mammals. Forest Ecology and Management 277, 180-195.
| Crossref | Google Scholar |

Sullivan TP, Ransome DB, Sullivan DS, Lindgren PMF, Klenner W (2017a) Tree squirrel abundance and demography in managed coniferous forests of British Columbia are within the range of natural fluctuations of old-growth stands. Canadian Journal of Forest Research 47, 565-582.
| Crossref | Google Scholar |

Sullivan TP, Sullivan DS, Boonstra R, Krebs CJ, Vyse A (2017b) Mechanisms of population limitation in the southern red-backed vole in conifer forests of western North America: insights from a long-term study. Journal of Mammalogy 98, 1367-1378.
| Crossref | Google Scholar |

Sullivan TP, Sullivan DS, Lindgren PMF, Ransome DB, Klenner W (2021) Acceleration of forest structural development for large trees and mammals: restoration in decades or centuries? Forests 12, 388.
| Crossref | Google Scholar |

Sutton DA (1992) Tamias amoenus. Mammalian Species 390, 1-8.
| Crossref | Google Scholar |

Swihart RK, Goheen JR, Schnelker SA, Rizkalla CE (2007) Testing the generality of patch and landscape-level predictors of tree squirrel occurrence at a regional scale. Journal of Mammalogy 88, 564-572.
| Crossref | Google Scholar |

Thorington RW, Koprowski JL, Steele MA, Whatton JF (2012) ‘Squirrels of the World.’ (The Johns Hopkins University Press, Baltimore, MD, USA) 472 p.

Van Horne B (1983) Density as a misleading indicator of habitat quality. Journal of Wildlife Management 47, 893-901.
| Crossref | Google Scholar |

Villette P, Krebs CJ, Jung TS, Boonstra R (2016) Can camera trapping provide accurate estimates of small mammal (Myodes rutilus and Peromyscus maniculatus) density in the boreal forest? Journal of Mammalogy 97, 32-40.
| Crossref | Google Scholar |

Villette P, Krebs CJ, Jung TS (2017) Evaluating camera traps as an alternative to live-trapping for estimating the density of snowshoe hares and red squirrels. European Journal of Wildlife Research 63, 7.
| Crossref | Google Scholar |

Volkmann LA, Hodges KE (2021) Post-fire movements of Pacific marten (Martes caurina) depend on the severity of landscape change. Movement Ecology 9, 49.
| Crossref | Google Scholar | PubMed |

Volkmann LA, Hodges KE (2022) Residual forest structure influences behaviour of Pacific Marten (Martes caurina) on post-fire landscapes. International Journal of Wildland Fire 31, 329-349.
| Crossref | Google Scholar |

Wells-Gosling N, Heaney LR (1984) Glaucomys sabrinus. Mammalian Species 229, 8.
| Google Scholar |

Wheatley M, Larsen KW, Boutin S (2002) Does density reflect habitat quality for North American red squirrels during a spruce-cone failure? Journal of Mammalogy 83, 716-727.
| Crossref | Google Scholar |

Wilk RJ, Raphael MG (2018) Survival and predators of Pacific marten in a salvage-logged pine forest, south-central Oregon. Northwestern Naturalist 99, 115-123.
| Crossref | Google Scholar |

Wilson TM, Carey AB (1996) Observations of weasels in second-growth Douglas-fir forests in the Puget Trough, Washington. Northwest Naturalist 77, 35-39.
| Crossref | Google Scholar |

Zugmeyer CA, Koprowski JL (2009) Severely insect-damaged forest: a temporary trap for red squirrels? Forest Ecology and Management 257, 464-470.
| Crossref | Google Scholar |