Assessing Dendrochronological Potential of Escallonia myrtilloides in the High Andes of Peru

Requena-Rojas, Edilson J.; Amoroso, Mariano M.; Ticse-Otarola, Ginette; Crispin‐DelaCruz, Doris B.

doi:10.3959/trr2019-8

Cited by 5 publications

(3 citation statements)

References 34 publications

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“…Previous dendrochronological studies have discovered annual rhythms in growth rings of trees and shrubs distributed around many different tropical ecosystems: from mangroves to the limit of woody vegetation at about 5000 m a.s.l. ; from woodland savannas to dry and flooded forests (Brienen et al, 2016; Franco‐Ramos et al, 2019; Kerr et al, 2018; Locosselli et al, 2020; Requena‐Rojas et al, 2021; Rodriguez‐Caton et al, 2021; Schöngart et al, 2017). Here we include new evidences of annual tree‐ring in the last unexplored frontier, the ever‐wet tropical forests.…”

Section: Discussionmentioning

confidence: 99%

Tree growth periodicity in the ever‐wet tropical forest of the Americas

et al. 2023

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The occurrence of annual growth rings in tropical trees—the result of the seasonal activity of vascular cambium—has been explained by seasonal water deficit or flooding periods. However, little is known about the drivers of annual tree‐ring formation under tropical hyper‐humid conditions without clear seasonal dry periods or flooding (ever‐wet conditions). Shelford's law states that the deficit or the excess of environmental resources limits plant growth. Accordingly, we hypothesize that excess soil moisture, a slight seasonal reduction of precipitation and a reduction in light availability determine rhythmic growth in ever‐wet tropical forests. We first assessed the occurrence of rhythmic growth in 14 tree species from the Biogeographic Chocó Region (annual rainfall 7200 mm) using three methods: Radiocarbon (14C) dating (all studied species), tree‐ring synchronization (4 species that have replicates) and automatic dendrometers (two species). Then, we assessed the effect of environmental drivers (rainfall, short‐wave radiation, temperature and soil moisture) on tree growth based on tree ring and dendrometer observations. We present evidence of annual tree‐ring formation in all 14 studied tree species. Depending on the tree species, we observed positive and negative correlations between growth, water availability and light availability. These relationships suggest that both excess or deficit of environmental resources may explain the seasonal pattern of tree growth. Although we cannot differentiate between excess soil water and low light availability by high cloudiness, we suggest that cloudiness frequency could affect tree growth in these forests. Synthesis. We reveal the annual formation of growth rings in the unexplored wetter‐end tropical forests, where seasonal growth depends on either high soil moisture and hypoxia or light limitations by cloudiness and photosynthesis constraints.

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Section: Discussionmentioning

confidence: 99%

Tree growth periodicity in the ever‐wet tropical forest of the Americas

et al. 2023

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“…This area is characterized by an average annual temperature of 11.9 AE 3.4 C, with minimum values being recorded from June to July (4.4 AE 6.7 C) and maximum values in November (19.9 AE 2.2 C). Average rainfall is 727 mm/year, with higher values from January to March (>100 mm, rainy season) (Requena-Rojas et al 2021).…”

Section: Study Areamentioning

confidence: 99%

Performance and physiological quality of Escallonia resinosa seeds: prospects for their use in reforestation and restoration

Huayta‐Hinojosa

LOZANO

Guerra

et al. 2022

Restoration Ecology

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In the Andes, many native forest species are not used in reforestation or restoration programs mainly due to a lack of information about their propagation. In this study, we evaluated the performance of the seeds of Escallonia resinosa by analyzing fruit and seed productivity and characteristics, seed physiological quality, and the germination rate of seeds collected at different stages of fruit physiological maturity, using tetrazolium and standard germination tests. Our results show an estimated production (mean AE SD) of 34,252.5 AE 25,900 fruits per tree and 26.5 AE 20 million seeds per tree. Seed length was 1.0 AE 0.13 mm and seed weight was 12.4 AE 1 μg. We recognized two different morphological types of seeds: Type I seeds (lacking testa) were unviable, whereas all Type II seeds (with testa) germinated. Seed viability and germination rates were 10.5 and 48.6%, respectively; therefore, the viability test underestimated the actual germination rate. Morphological or microsite variables of the parent tree did not influence seed viability or germination. Germination rates were highest (41.8 AE 2.5%) for the seeds of fruits harvested at the initial maturity stage (green fruits). Our results show that E. resinosa is a species with potential for reforestation and restoration projects in the Andes: it has high seed production and good germination performance, and seeds can be harvested from fruits collected at different stages of physiological maturity.

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“…Sin embargo, el conocimiento sobre la respuesta dendroclimática de los arbustos xerófitos de las regiones áridas y semiáridas del centro-oeste de Argentina posee aún escasos antecedentes. Estudios recientes indican el gran potencial que poseen los arbustos para extraer información dendroecológica y dendroclimática, sobre todo en grandes áreas del planeta donde la cobertura vegetal se restringe solo a esta bioforma (Myers-Smith et al, 2015;Camarero et al, 2021;Requena-Rojas et al, 2021). Por ello, los estudios dendroclimatológicos con arbustos toman relevancia en ambientes carentes de árboles, permitiendo realizar reconstrucciones climáticas que se extiendan más allá de los registros instrumentales del clima (Lu et al, 2021;Panthi et al, 2021).…”

Section: Introductionunclassified

Evaluación del potencial dendrocronológico de dos arbustos que coexisten en áreas desérticas de montaña del centro-oeste de Argentina

Melián,

Hadad,

Flores

et al. 2024

Darwiniana

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Los estudios dendrocronológicos con arbustos de ecosistemas áridos en América del Sur son de gran importancia para interpretar la ecología de estos ambientes debido a la escasez de estudios en la región. Este enfoque permite evaluar las respuestas de las poblaciones vegetales expuestas a las condiciones del clima árido. Desarrollamos cronologías de ancho de anillos y evaluamos, por primera vez para Argentina, la relación entre el crecimiento radial y variables climáticas (precipitación, temperatura e índice de aridez) de dos especies de arbustos característicos de ambientes montanos, Proustia cuneifolia y Hualania colletioides. La cronología de P. cuneifolia registró una correlación positiva con la precipitación (mayo), temperatura (octubre, julio y febrero) y SPEI (junio-octubre). La cronología de H. colletioides presentó relaciones negativas con la temperatura media de los meses de diciembre y febrero. Los resultados sugieren que las variaciones en el ancho de los anillos anuales de P. cuneifolia están influenciadas por el clima regional, principalmente por la aridez, mientras que el crecimiento de H. colletioides podría estar influenciado por factores a escala de micrositio. La intrincada orografía cordillerana genera variaciones en las condiciones climáticas, las cuales pueden imprimir respuestas particulares del crecimiento. Por ello, una red de cronologías ayudaría a interpretar en detalle la respuesta del crecimiento de estas plantas al clima cordillerano.

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Assessing Dendrochronological Potential of Escallonia myrtilloides in the High Andes of Peru

Cited by 5 publications

References 34 publications

Tree growth periodicity in the ever‐wet tropical forest of the Americas

Tree growth periodicity in the ever‐wet tropical forest of the Americas

Performance and physiological quality of Escallonia resinosa seeds: prospects for their use in reforestation and restoration

Evaluación del potencial dendrocronológico de dos arbustos que coexisten en áreas desérticas de montaña del centro-oeste de Argentina

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