Biomass Dynamics in a Fragment of Brazilian Tropical Forest (Caatinga) over Consecutive Dry Years
Increases in water scarcity due to climate change, especially in dry regions, can affect the dynamics of successional species. In view of the longest sequence of dry years (2010–2019) to have occurred in the Brazilian semi-arid region, with a consequent reduction in water availability, the influence...
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MDPI AG
2020-11-01
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| author | Diego A. Campos Eunice M. Andrade Andréa D. A. Castanho Ramon C. Feitosa Helba Q. A. Palácio |
| author_facet | Diego A. Campos Eunice M. Andrade Andréa D. A. Castanho Ramon C. Feitosa Helba Q. A. Palácio |
| author_sort | Diego A. Campos |
| collection | DOAJ |
| description | Increases in water scarcity due to climate change, especially in dry regions, can affect the dynamics of successional species. In view of the longest sequence of dry years (2010–2019) to have occurred in the Brazilian semi-arid region, with a consequent reduction in water availability, the influence of rainfall distribution on the production of above-ground plant biomass was investigated in a Dry Tropical Forest (DTF). This natural change monitoring experiment was conducted over 11 years (2009–2019) in a fragment of DTF under regeneration for 40 years, in the district of Iguatu, Ceará, Brazil. All living individuals of the woody component with a Diameter at Ground Level (DGL) ≥3 cm and a height (h) ≥100 cm were measured during 2009–2010, 2015–2016, 2018–2019. Biomass production was calculated using an allometric equation defined for DTF species. A mean mortality rate of 134 ind. ha<sup>−1</sup> yr<sup>−1</sup> was registered, with a recruitment of 39 ind. ha<sup>−1</sup> yr<sup>−1</sup>, generating a mean deficit of 95 ind. ha<sup>−1</sup> yr<sup>−1</sup>. The mean reduction in biomass was 3.26 Mg ha<sup>−1</sup> yr<sup>−1</sup>. Climate conditions during consecutive dry years have a direct effect on the mortality and recruitment of woody species, with a recruitment/mortality ratio of 0.11. Shrubby-tree individuals of smaller diameter showed less resilience to the cumulative effect of drought. |
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| last_indexed | 2024-03-10T15:06:24Z |
| publishDate | 2020-11-01 |
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| series | Applied Sciences |
| spelling | doaj.art-b57e950af74a4b80b3c6083aa68839e22023-11-20T19:44:45ZengMDPI AGApplied Sciences2076-34172020-11-011021781310.3390/app10217813Biomass Dynamics in a Fragment of Brazilian Tropical Forest (Caatinga) over Consecutive Dry YearsDiego A. Campos0Eunice M. Andrade1Andréa D. A. Castanho2Ramon C. Feitosa3Helba Q. A. Palácio4Department of Agricultural Engineering, Federal University of Ceará, Campus Pici, Fortaleza 60455-760, CE, BrazilDepartment of Soil and Water Conservation, Federal University of the Semi-Arid Region, Rua Francisco Mota, 572, Mossoró CEP 59625-900, RN, BrazilThe Woods Hole Research Center, 149 Woods Hole Rd, Falmouth, MA 02540-1644, USADepartment of Agricultural Engineering, Federal University of Ceará, Campus Pici, Fortaleza 60455-760, CE, BrazilDepartment of Agricultural Engineering, Federal Institute of Ceará, Iguatu 60020-181, CE, BrazilIncreases in water scarcity due to climate change, especially in dry regions, can affect the dynamics of successional species. In view of the longest sequence of dry years (2010–2019) to have occurred in the Brazilian semi-arid region, with a consequent reduction in water availability, the influence of rainfall distribution on the production of above-ground plant biomass was investigated in a Dry Tropical Forest (DTF). This natural change monitoring experiment was conducted over 11 years (2009–2019) in a fragment of DTF under regeneration for 40 years, in the district of Iguatu, Ceará, Brazil. All living individuals of the woody component with a Diameter at Ground Level (DGL) ≥3 cm and a height (h) ≥100 cm were measured during 2009–2010, 2015–2016, 2018–2019. Biomass production was calculated using an allometric equation defined for DTF species. A mean mortality rate of 134 ind. ha<sup>−1</sup> yr<sup>−1</sup> was registered, with a recruitment of 39 ind. ha<sup>−1</sup> yr<sup>−1</sup>, generating a mean deficit of 95 ind. ha<sup>−1</sup> yr<sup>−1</sup>. The mean reduction in biomass was 3.26 Mg ha<sup>−1</sup> yr<sup>−1</sup>. Climate conditions during consecutive dry years have a direct effect on the mortality and recruitment of woody species, with a recruitment/mortality ratio of 0.11. Shrubby-tree individuals of smaller diameter showed less resilience to the cumulative effect of drought.https://www.mdpi.com/2076-3417/10/21/7813climate changesemi-arid regionfloristic diversitymortalityrecruitment |
| spellingShingle | Diego A. Campos Eunice M. Andrade Andréa D. A. Castanho Ramon C. Feitosa Helba Q. A. Palácio Biomass Dynamics in a Fragment of Brazilian Tropical Forest (Caatinga) over Consecutive Dry Years Applied Sciences climate change semi-arid region floristic diversity mortality recruitment |
| title | Biomass Dynamics in a Fragment of Brazilian Tropical Forest (Caatinga) over Consecutive Dry Years |
| title_full | Biomass Dynamics in a Fragment of Brazilian Tropical Forest (Caatinga) over Consecutive Dry Years |
| title_fullStr | Biomass Dynamics in a Fragment of Brazilian Tropical Forest (Caatinga) over Consecutive Dry Years |
| title_full_unstemmed | Biomass Dynamics in a Fragment of Brazilian Tropical Forest (Caatinga) over Consecutive Dry Years |
| title_short | Biomass Dynamics in a Fragment of Brazilian Tropical Forest (Caatinga) over Consecutive Dry Years |
| title_sort | biomass dynamics in a fragment of brazilian tropical forest caatinga over consecutive dry years |
| topic | climate change semi-arid region floristic diversity mortality recruitment |
| url | https://www.mdpi.com/2076-3417/10/21/7813 |
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