How rare is too rare to harvest?

Schulze, Mark; Grogan, James; Landis, Regina; Vidal, Edson

doi:10.1016/j.foreco.2008.02.051

Cited by 83 publications

(23 citation statements)

References 55 publications

(72 reference statements)

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“…contribute more than dominant taxa to aboveground carbon stocks (Table 4). Rareness is a characteristic trait in Amazonian forests (Pitman et al 2001, Schulze et al 2008, Hubbell 2013. Our study suggests that rare species may be particularly vulnerable if these are affected by intensifying anthropogenic pressures such as selective logging , Dablin 2014, Baraloto et al 2015) and enhanced mortality due to climate change (Brienen et al 2015).…”

Section: Discussionmentioning

confidence: 72%

“…Our study suggests that rare species may be particularly vulnerable if these are affected by intensifying anthropogenic pressures such as selective logging , Dablin 2014, Baraloto et al 2015) and enhanced mortality due to climate change (Brienen et al 2015). Brazil prohibits the harvest of trees at abundances lower than 0.03 stems ha -1 (Schulze et al 2008). In Bolivia, restriction applies to 0.25 stems ha -1 , yet above these thresholds, a common practice is to treat species equally.…”

Section: Discussionmentioning

confidence: 99%

“…The Bolivian government has rejected the carbon market approach but has created the Conjoint Mechanism for Climate Change Mitigation to support environmentally friendly initiatives (EPB 2012, Rouch 2015. REDD+ incentives are an opportunity for a rigorous revision and application of precautionary measures to adjust maximum harvesting limits and minimum cutting diameters at the species level to guarantee future yields, regeneration, and conservation of key species and their carbon in the southwestern Amazonian forest (van Gardingen et al 2006, Schulze et al 2008. Permanent plots are a valuable tool to address growth, phenology, and mortality and to inform forest management and climate change mitigation policies.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Economically important species dominate aboveground carbon storage in forests of southwestern Amazonia

Selaya¹,

Zuidema²,

Baraloto³

et al. 2017

E&S

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ABSTRACT. Tree species in tropical forests provide economically important goods and ecosystem services. In submontane forests of southwestern Amazonia, we investigated the degree to which tree species important for subsistence and trade contribute to aboveground carbon storage (AGC). We used 41 1-hectare plots to determine the species abundance, basal area, and AGC of stems > 10 cm diameter at breast height (dbh). Economically important taxa were classified using ethnobotanical studies and according to their stem density. These taxa (n = 263) accounted for 45% of total stems, 53% of total basal area, and 56% of total AGC, significantly more than taxa with minor or unknown uses (Welch test at p < 0.05). Taxa with 1-2 stems per hectare, or with fewer than 1 stem per hectare (common and rare) accounted for 35% of total AGC, more than the 22% accounted for by dominant taxa. High basal area had a greater impact on AGC than abundance in economic taxa because their populations are skewed to adult trees. Size in these taxa had a median dbh > 40 cm and few stems in regeneration classes of dbh < 10 to 20 cm (e.g., Bertholletia excelsa, Cariniana spp., Cedrelinga spp., Ceiba spp., Dipteryx spp.), whereas dominant Tetragastris spp., and Pseudolmedia spp. had most stems in low diameter classes and a median diameter of < 30 cm. Bertholletia excelsa, with 1.5 stems per hectare, showed the highest basal area of any species and accounted for 9% of AGC (11 Mg/ha), twice that of the second-ranking species. Our study shows that economic importance and carbon stocks in trees are closely linked in southwestern Amazonia. Unplanned harvests can disrupt synergistic dual roles altering carbon stocks temporally or permanently. Precautionary measures based on species ecology, demography, and regeneration traits should be at the forefront of REDD+ to reconcile maximum harvesting limits, biodiversity conservation, and sustainable forest management.

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Economically important species dominate aboveground carbon storage in forests of southwestern Amazonia

Selaya¹,

Zuidema²,

Baraloto³

et al. 2017

E&S

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“…Las densidades medias de cumarú (1,63 individuos/ha) y, en particular, de amapá (75 individuos/ha) (Cuadro 4) son altas si se las compara con la mayoría de especies de árboles de los bosques tropicales, que con frecuencia aparecen con baja densidadmenos de un árbol adulto por hectárea (Schulze et al, 2008b). En los casos del amapá y el cumarú, las elevadas densidades pueden ser producto de la influencia histórica antropogénica y del manejo cuidadoso que, con el tiempo, ha aumentado la densidad natural (Miller y Nair, 2006).…”

Section: Ecologíaunclassified

“…Estos tres árboles representan un subconjunto de las muchísimas especies de PFNM que actualmente busca la industria maderera independientemente de su valor no maderable. A pesar del valor económico y de uso directo que numerosas especies de árboles tienen para las comunidades rurales, el aprovechamiento forestal puede suponer una amenaza para la viabilidad de la población de especies con conflicto de uso Schulze et al, 2008b). No obstante, el látex, las semillas y los frutos producidos por las tres especies examinadas aquí, poseen suficiente valor comercial para influir en los pequeños productores para que desarrollen sofisticados regímenes de manejo cuando hay seguridad en la tenencia de la tierra.…”

Section: Conclusionesunclassified

Avances y perspectivas del manejo forestal para uso múltiple en el trópico húmedo

Guariguata¹

2013

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Long‐term Spartina alterniflora invasion simplified soil seed bank and regenerated community in a coastal marsh wetland

Jia

et al. 2022

Ecological Applications

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The coastal wetland is easily invaded by alien species due to locating in the land and sea transitional area. As a potential driving regeneration force, the soil seed bank is vital to the community restoration and species diversity protection. To reveal the long‐term Spartina alterniflora invasion impact on the soil seed banks and regenerated communities, we investigated the seed banks under the different vegetation types (S. alterniflora, Phragmites australis, Scirpus mariqueter, ruderal and unvegetated site) and soil depths (0–5 and 5–10 cm) in the coastal salt marsh wetland, Chongming island, eastern China. The results showed that the soil seed bank richness and species density under different vegetation types were higher than the aboveground vegetation, and those of 0–5 cm seed banks were higher than 5–10 cm, except for the unvegetated site. The species richness and S. alterniflora seed proportion in the seed banks under S. alterniflora communities (S.AS) were lower and larger respectively than those of other sites. The species composition between S.AS and the aboveground communities showed high similarity with aggregation phylogenetic structures in two soil depths. The seed bank variations at 0–5 and 5–10 cm depths were interpreted 3.03% and 2.25% by the aboveground communities, while 4.92% and 5.55% were interpreted by the soil microbial biomass. The SEM model explained 98.1% and 91.8% of the seed banks richness at the 0–5 cm depth and 5–10 cm depth, respectively, and explained 98.8% and 46.1% of the seed banks species density at the 0–5 cm depth and 5–10 cm depth, respectively. The aboveground vegetation biomass and abundance directly affected the 0–5 cm seed banks richness and species density, while its height and biomass only affected the 5–10 cm seed banks species density. The 0–10 cm soil depth microbial biomass indirectly affected the 0–5 cm seed banks richness and species density, while affected the 5–10 cm seed banks richness. Soil physical and chemical properties only indirectly affected the 0–5 cm seed banks species density. The results provided a reference for the ecological evaluation of the impacts of S. alterniflora invasion into the coastal salt marsh wetland of eastern China, and guidance for the protection and restoration of the native plant communities.

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How rare is too rare to harvest?

Cited by 83 publications

References 55 publications

Economically important species dominate aboveground carbon storage in forests of southwestern Amazonia

Economically important species dominate aboveground carbon storage in forests of southwestern Amazonia

Avances y perspectivas del manejo forestal para uso múltiple en el trópico húmedo

Long‐term Spartina alterniflora invasion simplified soil seed bank and regenerated community in a coastal marsh wetland

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How rare is too rare to harvest?

Cited by 83 publications

References 55 publications

Economically important species dominate aboveground carbon storage in forests of southwestern Amazonia

Economically important species dominate aboveground carbon storage in forests of southwestern Amazonia

Avances y perspectivas del manejo forestal para uso m&uacute;ltiple en el tr&oacute;pico h&uacute;medo

Long‐term Spartina alterniflora invasion simplified soil seed bank and regenerated community in a coastal marsh wetland

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Avances y perspectivas del manejo forestal para uso múltiple en el trópico húmedo