Disturbance Legacy on Soil Carbon Stocks and Stability within a Coastal Temperate Forest of Southwestern British Columbia, Canada

Defrenne, Camille E.; Wilson, Julie E.; Simard, Suzanne W.; Lavkulich, L. M.

doi:10.4236/ojf.2016.65025

Cited by 5 publications

(4 citation statements)

References 33 publications

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“…Our finding that mineral soil C storage at 15-55 cm could be three times greater than C stored at 0-15 cm confirms the need to measure mineral soil C below 15 cm when calculating total ecosystem C, as recommended by Grand and Lavkulich (2011). In Pacific Northwest coastal forests, at least 50% of soil C storage is below 20 cm depth (Homann et al, 2005;Grand and Lavkulich, 2011;Defrenne et al, 2016) and Batjes (1996) reported an approximately 60% increase in the global soil organic C budget estimate if a second meter of soil is included in the calculation.…”

Section: Relationship Between Mineral Soil Carbon Stocks Depth and Climatesupporting

confidence: 66%

Tree Diversity, Site Index, and Carbon Storage Decrease With Aridity in Douglas-Fir Forests in Western Canada

Roach¹,

Simard²,

Defrenne³

et al. 2021

Front. For. Glob. Change

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Forests are important for biodiversity, timber production and carbon accumulation, but these ecosystem services may be impacted by climate change. Field data collected from individual forest types occurring across a climatic gradient can contribute to forecasting these consequences. We examined how changes in temperature, precipitation and aridity affect ecosystem services in 23 mature Douglas-fir (Pseudotsuga menziesii) forests in nine climatic regions across a 900 km gradient in British Columbia, Canada. Using Canadian National Forest Inventory methodology, we assessed richness and diversity of plant functional groups, site index, and above- and below-ground carbon stocks. As aridity increased, ecosystem-level tree species richness declined on average from four to one species, Douglas-fir site index declined from 30 to 15 m, and ecosystem carbon storage decreased from 565 to 222 Mg ha–1. Tree species richness was positively and herb species richness negatively correlated with carbon storage. Carbon storage by ecosystem compartment was largest in aboveground live tree biomass, declining in the following order: mineral soils > coarse woody debris and dead standing trees > forest floor > small and fine woody debris > understory plants. Mineral soil carbon at depths of 0-15 cm, 15-35 cm, and 35-55 cm increased with increasing mean annual precipitation and decreasing aridity. Our results indicate that as aridity increases and precipitation decreases, tree species richness, site index and carbon storage in existing Douglas-fir forests declines. However, assisted or natural migration of Douglas-fir into more humid regions could be associated with more diverse, productive, carbon-rich forests. This study informs carbon stock vulnerability and provides empirical data essential for carbon stock forecasts.

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Section: Relationship Between Mineral Soil Carbon Stocks Depth and Climatesupporting

confidence: 66%

Tree Diversity, Site Index, and Carbon Storage Decrease With Aridity in Douglas-Fir Forests in Western Canada

Roach¹,

Simard²,

Defrenne³

et al. 2021

Front. For. Glob. Change

Self Cite

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“…The role of old age in a forest is also a rich field of research today. [16] For these reasons, the growth patterns in table 1 represent averages based on close reading of the USDA Silvics Manuals. [18] Therefore, on average, 1ft 2 of mass timber avoids 18 lbs CO2e of embodied carbon compared to concrete.…”

Section: Species Growth Patternsmentioning

confidence: 99%

Fringe Timber: Informing Regional Mass Timber Urban Environments with Biodiverse Forests

Wikstrom

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Trees present a vast array of performance in density, growth speed, height, fibre strength, and rates of carbon absorption. This paper explores how biodiverse mass timber is a way to support forest health and improve the health conditions of the most vulnerable—those who have experienced the pollution of mineral-based materials for generations. This symbiotic relationship between forests and urban environments incentivizes better care for both spaces, the transfer of materials should be reciprocal. Fringe Timber looks at the forest surrounding a city to inform its scale of growth and reduce its carbon footprint. Using three case studies in New York City, Denver, and Tulsa, this paper posits city-specific, species-driven supply chains beyond softwoods for mass timber, including hardwoods and hybrids, to support the appropriate scale and speed for urban development.

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“…The infrequency of disturbances (0.03%–0.84% area disturbed per year, 2000–2012; Buma et al 2017 ) combined with the longevity of many dominant tree species (often more than 500 years; Waring and Franklin 1979 ) means that, at broad temporal and spatial scales, materials export from forests to streams generally depends on climatically mediated changes in the hydrologic cycle itself. Increasing disturbance frequency may, however, have a negative effect on soil C stocks and stability because of disruption of the soil profile, alteration of infiltration and drainage, and changes in species composition (Defrenne et al 2016 ). Summer drought is driving increases in fire prevalence and extent in portions of the NPCTR, where this disturbance was historically infrequent (Reilly et al 2017 ) and increases in fire severity in areas in which fire was already important historically (Schoennagel et al 2017 ).…”

Section: Terrestrial Production and Delivery Of Materials To Surface Watersmentioning

confidence: 99%

Climate-Mediated Changes to Linked Terrestrial and Marine Ecosystems across the Northeast Pacific Coastal Temperate Rainforest Margin

et al. 2021

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Coastal margins are important areas of materials flux that link terrestrial and marine ecosystems. Consequently, climate-mediated changes to coastal terrestrial ecosystems and hydrologic regimes have high potential to influence nearshore ocean chemistry and food web dynamics. Research from tightly coupled, high-flux coastal ecosystems can advance understanding of terrestrial–marine links and climate sensitivities more generally. In the present article, we use the northeast Pacific coastal temperate rainforest as a model system to evaluate such links. We focus on key above- and belowground production and hydrological transport processes that control the land-to-ocean flow of materials and their influence on nearshore marine ecosystems. We evaluate how these connections may be altered by global climate change and we identify knowledge gaps in our understanding of the source, transport, and fate of terrestrial materials along this coastal margin. Finally, we propose five priority research themes in this region that are relevant for understanding coastal ecosystem links more broadly.

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Disturbance Legacy on Soil Carbon Stocks and Stability within a Coastal Temperate Forest of Southwestern British Columbia, Canada

Cited by 5 publications

References 33 publications

Tree Diversity, Site Index, and Carbon Storage Decrease With Aridity in Douglas-Fir Forests in Western Canada

Tree Diversity, Site Index, and Carbon Storage Decrease With Aridity in Douglas-Fir Forests in Western Canada

Fringe Timber: Informing Regional Mass Timber Urban Environments with Biodiverse Forests

Climate-Mediated Changes to Linked Terrestrial and Marine Ecosystems across the Northeast Pacific Coastal Temperate Rainforest Margin

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