Faculty Opinions recommendation of Scale-dependence of aboveground carbon accumulation in secondary forests of Panama: A test of the intermediate peak hypothesis.

Abstract Woody encroachment, including both woody species expansion and density increase, is a globally observed phenomenon that deteriorates arid and semi-arid rangeland health, biodiversity, and ecosystem services. Mechanical and chemical control treatments are commonly performed to reduce woody cover and restore ecohydrologic function. While the immediate impacts of woody control treatments are well documented in short-term studies, treatment impacts at decadal scales are not commonly studied. Using a controlled herbicide treatment from 1954 in the Sierra Ancha Experimental Forest in central Arizona, USA, we quantify woody encroachment and associated aboveground carbon accumulation in treated and untreated watersheds. Woody encroachment and aboveground carbon are estimated using high resolution multispectral images and photogrammetric data from a fixed-wing unmanned aerial vehicle (UAV). We then combine the contemporary UAV image-derived estimates with historical records from immediately before and after the treatment to consider long-term trends in woody vegetation cover, aboveground carbon, water yield, and sedimentation. Our results indicate that the treatment has had a lasting impact. More than six decades later, woody cover in two treated watersheds are still significantly lower compared to two control watersheds, even though woody cover increased in all four drainages. Aboveground woody carbon in the treated watersheds is approximately one half that accumulated in the control watersheds. The historical records indicate that herbicide treatment also increased water yield and reduced annual sedimentation. Given the sustained reduction in woody cover and aboveground woody biomass in treated watersheds, we infer that the herbicide treatment has had similarly long lasting impacts on ecohydrological function. Land managers can consider legacy impacts from control treatments to better balance carbon and ecohydrological consequences of woody encroachment and treatment activities.

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Predicting Carbon Accumulation in Temperate Forests of Ontario, Canada Using a LiDAR-Initialized Growth-and-Yield Model

Remote Sensing ◽

10.3390/rs12010201 ◽

2020 ◽

Vol 12 (1) ◽

pp. 201

Author(s):

Paulina T. Marczak ◽

Karin Y. Van Ewijk ◽

Paul M. Treitz ◽

Neal A. Scott ◽

Donald C.E. Robinson

Keyword(s):

Carbon Stock ◽

Temperate Forests ◽

Species Abundance ◽

Carbon Accumulation ◽

Growth And Yield ◽

Diameter Distribution ◽

Stem Density ◽

Yield Model ◽

Validation Data ◽

Aboveground Carbon

Climate warming has led to an urgent need for improved estimates of carbon accumulation in uneven-aged, mixed temperate forests, where high uncertainty remains. We investigated the feasibility of using LiDAR-derived forest attributes to initialize a growth and yield (G&Y) model in complex stands at the Petawawa Research Forest (PRF) in eastern Ontario, Canada; i.e., can G&Y models based on LiDAR provide accurate predictions of aboveground carbon accumulation in complex forests compared to traditional inventory-based estimates? Applying a local G&Y model, we forecasted aboveground carbon stock (tons/ha) and accumulation (tons/ha/yr) using recurring plot measurements from 2012–2016, FVS1. We applied statistical predictors derived from LiDAR to predict stem density (SD), stem diameter distribution (SDD), and basal area distribution (BA_dist). These data, along with measured species abundance, were used to initialize a second model (FVS2). A third model was tested using LiDAR-initialized tree lists and photo-interpreted estimates of species abundance (i.e., FVS3). The carbon stock projections for 2016 from the inventory-based G&Y model) were equivalent to validation carbon stocks measured in 2016 at all size-class levels (p < 0.05), while LiDAR-based G&Y models were not. None of the models were equivalent to validation data for accumulation (p > 0.05). At the plot level, LiDAR-based predictions of carbon accumulation over a nine-year period did not differ when using either inventory or photo-interpreted species (p < 0.05). Using a constant mortality rate, we also found statistical equivalency of inventory and photo-interpreted accumulation models for all size classes ≥17 cm. These results suggest that more precise information is needed on tree characteristics than we could derive from LiDAR, but that plot-level species information is not as critical for predictions of carbon accumulation in mixed-species forests. Further work is needed on the use of LiDAR to quantify stand properties before this technique can be used to replace recurring plot measurements to quantify carbon accumulation.

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Carbon Accumulation in Neotropical Dry Secondary Forests: The Roles of Forest Age and Tree Dominance and Diversity

Ecosystems ◽

10.1007/s10021-017-0168-2 ◽

2017 ◽

Vol 21 (3) ◽

pp. 536-550 ◽

Cited By ~ 12

Author(s):

Francisco Mora ◽

Víctor J. Jaramillo ◽

Radika Bhaskar ◽

Mayra Gavito ◽

Ilyas Siddique ◽

...

Keyword(s):

Carbon Accumulation ◽

Secondary Forests ◽

Forest Age

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Floristic Composition and Structure of a Deciduous Dry Forest from Southern Ecuador: Diversity and Aboveground Carbon Accumulation

International Journal of Current Research and Academic Review ◽

10.20546/ijcrar.2016.403.017 ◽

2016 ◽

Vol 5 (3) ◽

pp. 154-169 ◽

Cited By ~ 2

Author(s):

Vinicio Carrion-Paladines ◽

Roberto Garcia-Ruiz

Keyword(s):

Floristic Composition ◽

Carbon Accumulation ◽

Dry Forest ◽

Aboveground Carbon ◽

Composition And Structure ◽

Southern Ecuador ◽

Deciduous Dry Forest

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Aboveground carbon accumulation by second-growth forests after deforestation in Hawai’i

Forest Service Research Data Archive ◽

10.2737/rds-2021-0089 ◽

2021 ◽

Author(s):

Richard F. Hughes ◽

Dennis Grossman ◽

Travis G. Sowards ◽

Jonathan D. Marshall ◽

Dieter Mueller-Dombois

Keyword(s):

Carbon Accumulation ◽

Aboveground Carbon ◽

Second Growth

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Deforestation scenarios show the importance of secondary forest for meeting Panama’s carbon goals

Landscape Ecology ◽

10.1007/s10980-021-01379-4 ◽

2022 ◽

Author(s):

Jefferson S. Hall ◽

Joshua S. Plisinski ◽

Stephanie K. Mladinich ◽

Michiel van Breugel ◽

Hao Ran Lai ◽

...

Keyword(s):

Climate Change ◽

Carbon Sequestration ◽

Secondary Forest ◽

Woody Debris ◽

Forest Growth ◽

Carbon Accumulation ◽

Carbon Gain ◽

Forest Loss ◽

Secondary Forests ◽

Central Panama

Abstract Context Tropical forest loss has a major impact on climate change. Secondary forest growth has potential to mitigate these impacts, but uncertainty regarding future land use, remote sensing limitations, and carbon model accuracy have inhibited understanding the range of potential future carbon dynamics. Objectives We evaluated the effects of four scenarios on carbon stocks and sequestration in a mixed-use landscape based on Recent Trends (RT), Accelerated Deforestation (AD), Grow Only (GO), and Grow Everything (GE) scenarios. Methods Working in central Panama, we coupled a 1-ha resolution LiDAR derived carbon map with a locally derived secondary forest carbon accumulation model. We used Dinamica EGO 4.0.5 to spatially simulate forest loss across the landscape based on recent deforestation rates. We used local studies of belowground, woody debris, and liana carbon to estimate ecosystem scale carbon fluxes. Results Accounting for 58.6 percent of the forest in 2020, secondary forests (< 50 years) accrue 88.9 percent of carbon in the GO scenario by 2050. RT and AD scenarios lost 36,707 and 177,035 ha of forest respectively by 2030, a carbon gain of 7.7 million Mg C (RT) and loss of 2.9 million Mg C (AD). Growing forest on all available land (GE) could achieve 56 percent of Panama’s land-based carbon sequestration goal by 2050. Conclusions Our estimates of potential carbon storage demonstrate the important contribution of secondary forests to land-based carbon sequestration in central Panama. Protecting these forests will contribute significantly to meeting Panama’s climate change mitigation goals and enhance water security.

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Syntaxonomy of mid-successional stages of secondary forests of the central elevated part of the Southern Urals

Vegetation of Russia ◽

10.31111/vegrus/2012.20.109 ◽

2012 ◽

pp. 109-134

Author(s):

P. S. Shirokikh ◽

A. M. Kunafin ◽

V. B. Martynenko

Keyword(s):

Boreal Forests ◽

Floristic Composition ◽

Southern Urals ◽

Secondary Forests ◽

Natural Forests ◽

The Southern Urals ◽

Active Growth ◽

Tree Layer ◽

Shade Tolerant Species ◽

Successional Stages

The secondary birch and aspen forests of middle stages of succession of the central elevated part of the Southern Urals are studied. 4 subassociations, 1 community, and 7 variants in the alliances of Aconito-Piceion and Piceion excelsae are allocated. It is shown that the floristic composition of aspen and birch secondary forests in the age of 60—80 years is almost identical to the natural forests. However, a slight increase the coenotical role of light-requiring species of grasslands and hemiboreal forests in the secondary communities of the class Brachypodio-Betuletea was noticed as well as some reduction of role the shade-tolerant species of nemoral complex and species of boreal forests of the class Vaccinio-Piceetea. Dominant tree layer under the canopy of secondary series is marked by an active growth of natural tree species.

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Diversité floristique spontanée des plantations de café et de cacao dans la forêt classée de Monogaga, Côte d'Ivoire | Spontaneous floristic diversity of cocoa and coffee plantations in the classified forest of Monogaga, Côte d'Ivoire (reviewed paper)

Schweizerische Zeitschrift fur Forstwesen ◽

10.3188/szf.2006.0031 ◽

2006 ◽

Vol 157 (2) ◽

pp. 31-36 ◽

Cited By ~ 2

Author(s):

Constant Yves Adou Yao ◽

Edouard Kouakou N'Guessan

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Diversity Index ◽

Agricultural Practices ◽

Woody Species ◽

Secondary Forests ◽

Cote D’Ivoire ◽

Coffee Plantations ◽

Côte D'ivoire ◽

High Tree Density

The inventory and the analysis of the woody species preserved in the different categories of cocoa and coffee plantations showed that they are relatively diversified (presence of endemic, rare and threatened species). They also preserved high tree density and high basal areas. The young plantations are especially diversified. Their number of species,density and basal areas and diversity index are similar to those of the neighbouring old growth and secondary forests. Older plantations display a sharp decline of diversity over time. Agricultural practices in the region represent a threat in the medium term to the preservation of biodiversity.

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