Proforestation

Proforestation is the practice of protecting existing natural forests to foster continuous growth, carbon accumulation, and structural complexity.[1][2] It is recognized as an important forest based strategy for addressing the global crises in climate and biodiversity.[2][3] Forest restoration can be a strategy for climate change mitigation.[4]: 37  Proforestation complements other forest-based solutions like afforestation, reforestation and improved forest management.

Allowing proforestation in some secondary forests will increase their accumulated carbon and biodiversity over time. Strategies for proforestation include rewilding,[5] such as reintroducing apex predators and keystone species as, for example, predators keep the population of herbivores in check (which reduce the biomass of vegetation). Another strategy is establishing wildlife corridors connecting isolated protected areas.[6][7]

Definition

Proforestation refers specifically to enabling continuous forest growth uninterrupted by active management or timber harvesting, a term coined by scientists William Moomaw, Susan Masino, and Edward Faison.[8][1]

Proforestation is a natural climate solution that addresses climate mitigation and adaptation by prioritizing natural processes and regeneration in existing forests to optimize cumulative carbon and ecological complexity.[1]

Proforestation seeks to strengthen and sustain complexity and carbon accumulation in forest ecosystems. As ecologist Ed Faison states, "forests provide these services incredibly well when left alone; in fact over time unmanipulated forests develop the greatest complexity and accumulated carbon storage and therefore serve as models for "ecological forestry" techniques.[9][10][11]

Proforestation differs from agroforestry or the cultivation of forest plantations, the latter consisting of similarly aged trees of just one or two species. Plantations can be an efficient source of wood but often come at the expense of natural forests and cultivate little habitat for biodiversity, such as dead and fallen trees or understory plants. Further, once factoring in emissions from clearing the land and the decay of plantation waste and products at the end of their often brief lifecycles (e.g. paper products), plantations sequester 40 times less carbon than natural forests.[12]

Proforestation is specifically recommended in “World Scientists’ Warning of a Climate Emergency, as a means to “quickly curtail habitat and biodiversity loss” and protect “high carbon stores” and areas “with the capacity to rapidly sequester carbon.”[13]

Proforestation is part of a suite of forest-based climate solutions that includes avoided conversion, afforestation, reforestation and improved forest management.[14]

Benefits

Proforestation offers many benefits, from sequestering carbon for climate change mitigation and sustaining biodiversity, to providing ecosystem services, including water filtration, flood buffering, and maintaining soil health.[15]

Carbon Sequestration

According to the Intergovernmental Panel on Climate Change, about 730 billion tons of CO2 (or 199 billion tons of carbon) will need to be removed from the atmosphere by 2100. This is an enormous amount (more than was emitted by the US, the UK, Germany and China since the Industrial Revolution) and forests will play an essential role in this removal.[12]

In the United States, forests currently remove enough atmospheric CO2 to reduce national net emissions by 11 percent each year.[1] And each additional 8.6 million hectares of land regenerated to natural forest would sequester another 1 billion tons of carbon by 2100.[12]

Research has found that in complex forests of all types, the largest one percent of trees (by diameter) store about half of the carbon.[8] Facilitating growth of larger trees will increase carbon sequestration. Research also found that replacing old growth forests with young forests, even counting carbon ‘sequestered’ in long-lasting wood products (e.g. houses), leads to an overall increase in carbon emissions and that proforestation leads to the largest carbon storage capability.[16][17] Compared to clearcutting, complex forest ecosystems retain more than twice the carbon.[18]

Sustaining Biodiversity

Wilderness areas are examples of proforestation and have been shown to reduce the rate of extinction at broad scales.[19] Primary forests in some regions have been shown to hold far more biodiversity than “disturbed forests.” According to a meta-analysis of 138 studies of tropical forest ecosystems, researchers found that “most forms of forest degradation have an overwhelmingly detrimental effect on tropical biodiversity,” leading them to conclude that “when it comes to maintaining tropical biodiversity, there is no substitute for primary forests.”[20] Proforestation also results in greater cumulative carbon storage and structural complexity compared to that found in similar forests that are actively managed.[9] Enhanced structural complexity is achieved via dynamic natural processes and disturbances which often give rise to a greater abundance and diversity of flora and fauna.[9][21][22] Proforestation is therefore a powerful forest-based strategy that can help address the global crises in climate and biodiversity.[23]

Providing Ecosystem Services

Forests provide a variety of ecosystem services: cleaning the air, accumulating carbon, filtering water, and reducing flooding and erosion.[24] Forests are the most biodiverse land-based ecosystem, and provide habitat for a vast array of animals, birds, plants and other life. They can provide food and material and also opportunities for recreation and education. Research has found that forest plantations “may result in reduced diversity and abundance of pollinators compared with natural forests that have greater structural and plant species diversity.”[25]

Increasing Forest and Community Resilience

1.6 billion people worldwide depend on forests for their livelihoods, including 300-350 million (half of whom are Indigenous peoples) who live near or within “dense forests” and depend almost entirely on these ecosystems for their survival.[26] Rural households in Asia, Africa, and Latin America also depend on forests for about a quarter of their total incomes, with about half of this in the form of food, fodder, energy, building materials and medicine.[27] Proforestation can protect full native biodiversity and support the forests and other land types that provide resources we need. For example, research has found that old growth and complex forests are more resistant to the effects of climate change. One study found that taller trees had increased drought resistance, being able to capture and retain water better, due to their deeper root system and larger biomass. This means that even in dry conditions, these trees continued to photosynthesize at a higher rate than smaller trees.[28] Further, old-growth forests have been shown to be more resistant to fires compared to young forests with trees that have thinner bark and with more fuel available for increasing temperatures and fire damage.[29] Proforestation can help to reduce fire risks to forests and the surrounding communities. They can also help absorb water and prevent flooding to surrounding communities.[30] Considering the variety of ecosystem services complex forests provide, sustaining healthy forests means adjacent communities will be better off as well.

Proforestation and forest fires

Considering the rise in the acreage of forests that have experienced wildfires in the United States during the last three decades.[31] It is essential to consider the connection between forest management practices and forest fires. Many believe that the intensity and scale of recent fires are closely linked to the accumulation of fuels in the forest understory. This accumulation occurs due to a lack of forest management efforts aimed at reducing these fuels, which typically include activities like pulping, masticating, thinning, raking, and prescribed burning. Nonetheless, there is evidence to suggest that proforestation may, in fact, decrease the risk of wildfires.[32] Several key factors warrant consideration in this regard. Firstly, it's important to acknowledge that fire is a natural and intrinsic component of forest ecosystems in the Western U.S. Secondly, the occurrence, size, and extent of wildfires are typically not entirely preventable, even with efforts focused on removing fuels from the forest. [32] Thirdly, it's worth noting that the current extent of forest area burned by wildfires is considerably lower than it was during the first half of the twentieth century, a period characterized by more intensive timber harvesting practices and less active wildfire suppression efforts.[33] Interestingly, over the past three decades, intact forests in the Western U.S. experienced significantly lower-intensity wildfires compared to managed forests.[34] The heightened potential for fuel in intact forests seems to be balanced out by factors such as drier conditions, higher wind speeds, the presence of smaller trees, and the presence of residual, more combustible fuels found in managed areas.[32] Instead of combating wildfires indiscriminately, the most effective strategy involves restricting development in fire-prone regions, establishing and defending zones around existing developments, particularly in wildland-urban interface areas, and implementing construction codes that prioritize fire-resistant structures.[32]

Policy and media

Proforestation was featured in July 2019 on NEXT[35] by the New England News Collaborative on New England Public Radio [36] and on the EnviroShow.[37] It has also been highlighted in major editorials,[38] in a letter signed by 370 top scientists with expertise in climate, ecology and health, and recommended specifically in “World Scientists’ Warning of a Climate Emergency, as a means to “quickly curtail habitat and biodiversity loss” and protect “high carbon stores” and areas “with the capacity to rapidly sequester carbon.”[39]

Leveraging nature-based solutions is consistent with the recommendations of the Paris Agreement and the Intergovernmental Panel on Climate Change (IPCC) and the goals of the US Climate Alliance. Nature-based solutions can counteract the negative climate, environmental and ecological effects of deforestation and forest manipulation and extraction.[37][40]

In August 2019, an IPCC Special Report titled “Climate Change and Land” identified land use as a major driver of and a major solution to the climate crisis. A piece in The Conversation referred to the IPCC Special Report and highlighted the importance of natural forests and proforestation. Climate activist Bill McKibben came out against biomass and in favor of proforestation in an article titled "Don’t Burn Trees to Fight Climate Change—Let Them Grow" in the New Yorker. This policy position was echoed in a blog[41] piece co-released by the Nicholas School at Duke University Duke and the Cary Institute for Ecosystem Studies.

Proforestation was also prominently featured at the Climate Action Network International. Recent press releases on proforestation include Trinity College, Frontiers, and Symposium at Harvard Forest.

References

  1. ^ a b c d Moomaw, William R.; Masino, Susan A.; Faison, Edward K. (2019). "Intact Forests in the United States: Proforestation Mitigates Climate Change and Serves the Greatest Good". Frontiers in Forests and Global Change. 2: 27. Bibcode:2019FrFGC...2...27M. doi:10.3389/ffgc.2019.00027.
  2. ^ a b Di Sacco, Alice; Hardwick, Kate A.; Blakesley, David; Brancalion, Pedro H. S.; Breman, Elinor; Cecilio Rebola, Loic; Chomba, Susan; Dixon, Kingsley; Elliott, Stephen; Ruyonga, Godfrey; Shaw, Kirsty; Smith, Paul; Smith, Rhian J.; Antonelli, Alexandre (25 January 2021). "Ten golden rules for reforestation to optimize carbon sequestration, biodiversity recovery and livelihood benefits". Global Change Biology. 27 (7): 1328–1348. Bibcode:2021GCBio..27.1328D. doi:10.1111/gcb.15498. hdl:20.500.11937/88524. ISSN 1354-1013. PMID 33494123. S2CID 225324365.
  3. ^ Mackey, Brendan; Kormos, Cyril F.; Keith, Heather; Moomaw, William R.; Houghton, Richard A.; Mittermeier, Russell A.; Hole, David; Hugh, Sonia (1 May 2020). "Understanding the importance of primary tropical forest protection as a mitigation strategy". Mitigation and Adaptation Strategies for Global Change. 25 (5): 763–787. Bibcode:2020MASGC..25..763M. doi:10.1007/s11027-019-09891-4. hdl:10072/394944. ISSN 1573-1596. S2CID 212681305.
  4. ^ IPCC (2022) Summary for policy makers in Climate Change 2022: Mitigation of Climate Change. Contribution of Working Group III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA
  5. ^ "Protecting 50% of our Lands and Oceans". One Earth.
  6. ^ "The natural world can help save us from climate catastrophe | George Monbiot". The Guardian. 3 April 2019.
  7. ^ Wilmers, Christopher C.; Schmitz, Oswald J. (October 19, 2016). "Effects of gray wolf-induced trophic cascades on ecosystem carbon cycling". Ecosphere. 7 (10). Bibcode:2016Ecosp...7E1501W. doi:10.1002/ecs2.1501.
  8. ^ a b Fen Montaigne, Why Keeping Mature Forests Intact Is Key to the Climate Fight, Yale Environment 360, 15 October 2019.
  9. ^ a b c Miller, Kathryn; et al. (20 July 2016). "National parks in the eastern United States harbor important older forest structure compared with matrix forests". Ecosphere. 7 (7). Bibcode:2016Ecosp...7E1404M. doi:10.1002/ecs2.1404.
  10. ^ Young, B. D., D'Amato, A. W., Kern, C. C., Kastendick, D. N., & Palik, B. J. (2017). Seven decades of change in forest structure and composition in Pinus resinosa forests in northern Minnesota, USA: Comparing managed and unmanaged conditions. Forest Ecology and Management, 395, 92-103.
  11. ^ "Ecological Forestry: Much More Than Retention Harvesting" (PDF). Retrieved July 1, 2021.
  12. ^ a b c Lewis, Simon; Wheeler, Charlotte; Mitchard, Edward; Koch, Alexander (4 April 2019). "Restoring natural forests is the best way to remove atmospheric carbon". Nature. 568 (7750): 25–28. Bibcode:2019Natur.568...25L. doi:10.1038/d41586-019-01026-8. PMID 30940972. S2CID 91190309.
  13. ^ Ripple, William; Wolf, Christopher; Newsome, Thomas; Barnard, Phoebe; Moomaw, William (January 2020). "World Scientists' Warning of a Climate Emergency". BioScience. 70 (1): 8–12. doi:10.1093/biosci/biz088. hdl:2445/151800. Retrieved 12 November 2020.
  14. ^ Mackey, B.; Kormos, C. F.; Keith, H. (12 March 2020). "Understanding the importance of primary tropical forest protection as a mitigation strategy". Mitigation and Adaptation Strategies for Global Change. 25 (5): 763–787. Bibcode:2020MASGC..25..763M. doi:10.1007/s11027-019-09891-4. hdl:10072/394944.
  15. ^ Griscom, Bronson; al, et. (October 2017). "Natural Climate Solutions". Proceedings of the National Academy of Sciences. 114 (44): 11645–50. Bibcode:2017PNAS..11411645G. doi:10.1073/pnas.1710465114. PMC 5676916. PMID 29078344.
  16. ^ Harmon, Mark; Ferrell, William; Franklin, Jerry (9 February 1990). "Effects on Carbon Storage of Conversion of Old-Growth Forests to Young Forests". Science. 247 (4943): 699–702. Bibcode:1990Sci...247..699H. doi:10.1126/science.247.4943.699. PMID 17771887. S2CID 29755884. Retrieved 12 November 2020.
  17. ^ "Proforestation". Regeneration.org. Retrieved 2023-02-01.
  18. ^ Nunery, Jared; Keeton, William (31 March 2010). "Forest carbon storage in the northeastern United States: Net effects of harvesting frequency, post-harvest retention, and wood products". Forest Ecology and Management. 259 (8): 1363–1375. doi:10.1016/j.foreco.2009.12.029. Retrieved 12 November 2020.
  19. ^ Di Marco, Moreno; Ferrier, Simon; Harwood, Tom D.; Hoskins, Andrew J.; Watson, James E. M. (September 2019). "Wilderness areas halve the extinction risk of terrestrial biodiversity". Nature. 573 (7775): 582–585. Bibcode:2019Natur.573..582D. doi:10.1038/s41586-019-1567-7. hdl:11573/1359824. ISSN 1476-4687. PMID 31534225. S2CID 202671090.
  20. ^ Gibson, Luke; Lee, Tien Ming; et, al (14 September 2011). "Primary forests are irreplaceable for sustaining tropical biodiversity". Nature. 478 (7369): 378–381. Bibcode:2011Natur.478..378G. doi:10.1038/nature10425. PMID 21918513. S2CID 4313192. Retrieved 21 April 2021.
  21. ^ Atrena, Anita; Banelytė, Gaia Giedrė; Læssøe, Thomas; Riis-Hansen, Rasmus; Bruun, Hans Henrik; Rahbek, Carsten; Heilmann-Clausen, Jacob (2020-12-15). "Quality of substrate and forest structure determine macrofungal richness along a gradient of management intensity in beech forests". Forest Ecology and Management. 478: 118512. doi:10.1016/j.foreco.2020.118512. ISSN 0378-1127. S2CID 221995033.
  22. ^ Zlonis, Edmund J.; Niemi, Gerald J. (2014-09-15). "Avian communities of managed and wilderness hemiboreal forests". Forest Ecology and Management. 328: 26–34. doi:10.1016/j.foreco.2014.05.017. ISSN 0378-1127.
  23. ^ Di Marco, Moreno; Ferrier, Simon; Harwood, Tom; Hoskins, Andrew; Watson, James (18 September 2019). "Wilderness areas halve the extinction risk of terrestrial biodiversity". Nature. 573 (7775): 582–585. Bibcode:2019Natur.573..582D. doi:10.1038/s41586-019-1567-7. hdl:11573/1359824. PMID 31534225. S2CID 202671090. Retrieved 21 April 2021.
  24. ^ "Ecosystem Services". Climate Change Resource Center. USDA and US Forest Service. Retrieved 21 April 2021.
  25. ^ Brockerhoff, Eckehard; et, al (4 November 2017). "Forest biodiversity, ecosystem functioning and the provision of ecosystem services". Biodiversity and Conservation. 26 (13): 3005–3035. Bibcode:2017BiCon..26.3005B. doi:10.1007/s10531-017-1453-2.
  26. ^ Jenkins, Michael; Schaap, Brian (April 2018). Background Analytical Study 1: Forest Ecosystem Services (PDF). United Nations Forum on Forests. Retrieved 21 April 2021.
  27. ^ Jenkins, Michael; Schaap, Brian (April 2018). Background Analytical Study 1: Forest Ecosystem Services (PDF). United Nations Forum on Forests. Retrieved 21 April 2021.
  28. ^ Giardina, Francesco; et, al (28 May 2018). "Tall Amazonian forests are less sensitive to precipitation variability". Nature Geoscience. 11 (6): 405–409. Bibcode:2018NatGe..11..405G. doi:10.1038/s41561-018-0133-5. S2CID 47004415. Retrieved 21 April 2021.
  29. ^ Binkley, Daniel; Sisk, Tom; Chambers, Carol; Springer, Judy; Block, William (2007). "The Role of Old-growth Forests in Frequent-fire Landscapes" (PDF). Ecology and Society. 12 (2): 18. doi:10.5751/ES-02170-120218.
  30. ^ Jenkins, Michael; Schaap, Brian (April 2018). Background Analytical Study 1: Forest Ecosystem Services (PDF). United Nations Forum on Forests. Retrieved 21 April 2021.
  31. ^ "Wildfires and Acres | National Interagency Fire Center". www.nifc.gov. Retrieved 2023-10-07.
  32. ^ a b c d Reinhardt, Elizabeth D.; Keane, Robert E.; Calkin, David E.; Cohen, Jack D. (2008). "Objectives and considerations for wildland fuel treatment in forested ecosystems of the interior western United States". Forest Ecology and Management. 256: 1997-2006. 256 (12): 1997–2006. doi:10.1016/j.foreco.2008.09.016.
  33. ^ Moomaw, William R.; Masino, Susan A.; Faison, Edward K. (2019). "Intact Forests in the United States: Proforestation Mitigates Climate Change and Serves the Greatest Good". Frontiers in Forests and Global Change. 2. Bibcode:2019FrFGC...2...27M. doi:10.3389/ffgc.2019.00027. ISSN 2624-893X.  This article incorporates text available under the CC BY 4.0 license.
  34. ^ Thompson, Jonathan R.; Foster, David R.; Scheller, Robert; Kittredge, David (October 2011). "The influence of land use and climate change on forest biomass and composition in Massachusetts, USA". Ecological Applications. 21 (7): 2425–2444. Bibcode:2011EcoAp..21.2425T. doi:10.1890/10-2383.1. ISSN 1051-0761. PMID 22073633. S2CID 18242286.
  35. ^ NEXT
  36. ^ Dankosky, John. "Episode 156: The Confusing Tangle of Immigration Law; Hunting for Old Growth Forests". New England News Collaborative.
  37. ^ a b "Enviro Show Proforestation Interview With Susan Masino". The Enviro Show. June 2019. Retrieved 24 July 2019.
  38. ^ "Amid climate crisis, a proposal to save Washington state forests for carbon storage, not logging". The Seattle Times. 2021-03-21. Retrieved 2021-07-01.
  39. ^ Ripple, William J; Wolf, Christopher; Newsome, Thomas M; Barnard, Phoebe; Moomaw, William R (2020-01-01). "World Scientists' Warning of a Climate Emergency". BioScience. 70 (1): 8–12. doi:10.1093/biosci/biz088. hdl:1808/30278. ISSN 0006-3568.
  40. ^ Moomaw, William; Leverett, Bob; Jonas, Robert; Leverett, Monica (July 24, 2019). "How to fight climate change? Save existing forests". Daily Hampshire Gazette.
  41. ^ Schlesinger, Bill (9 September 2019). "Woody Biomass Fuels". Duke.edu.