Mid- and late Holocene vegetation and environmental dynamics in the Llanganates National Park, Anteojos Valley, central Ecuadorian Andes

Villota, Andrea; León‐Yánez, Susana; Behling, Hermann

doi:10.1080/01916122.2014.977404

Cited by 3 publications

(2 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in the Guandera Biological Reserve (northern Ecuadorian Andes), from ca 5300 to 2100 cal yr BP the presence of peat bog plants indicates cool and moist conditions (Bakker et al 2008). In the pollen record from Laguna de Anteojos in the central Ecuadorian Andes, between ca 4100 to 2100 cal yr BP the presence of páramo taxa shows cooler conditions (Villota et al 2014). A study by Wille et al (2002) at Pantano de Pecho reflects cooler climatic conditions since ca 3700 cal yr BP.…”

Section: Comparison With Other Study Sitesmentioning

confidence: 99%

Three millennia of vegetation and environmental dynamics in the Lagunas de Mojanda region, northern Ecuador

Villota

Behling

León‐Yánez

2017

Acta Palaeobotanica

Self Cite

View full text Add to dashboard Cite

ABSTRACT. The pollen record from Lagunas de Mojanda, located at 3748 m a.s.l. (northern Ecuadorian Andes) reflects the vegetation and climate dynamics for the last ca 3400 cal yr BP. Páramo vegetation has been the main vegetation type since the beginning of the record. At Lagunas de Mojanda, from the last ca 3400 to 2200 cal yr BP, grass páramo was well represented mainly by Poaceae (40%) and the occurrence of Valeriana (5%), while montane forest taxa were poorly represented and subpáramo taxa were rare. The vegetation composition suggests cool and humid conditions. Between ca 2200 and ca 1300 cal yr BP, montane rainforest and subpáramo taxa had a higher presence but páramo taxa remained the main vegetation type in the study area, suggesting cool climatic conditions. From ca 1300 to ca 500 cal yr BP, páramo vegetation remained stable, with higher presence of Phlegmariurus and Isoetes, suggesting cool and humid conditions. The last ca 500 cal yr BP generally show lower frequency of montane rainforest and subpáramo taxa. Páramo vegetation reached the highest share, with the presence of Poaceae, Plantago and Ranunculus suggesting a trend of peat bog drying. Fires were present during the whole record, perhaps human-caused, but the study area does not show great disturbance except from ca 1300 to 500 cal yr BP, a period of an evident higher influx of charcoal particles coincidentally with nearby ancient human occupation.

show abstract

Section: Comparison With Other Study Sitesmentioning

confidence: 99%

Three millennia of vegetation and environmental dynamics in the Lagunas de Mojanda region, northern Ecuador

Villota

Behling

León‐Yánez

2017

Acta Palaeobotanica

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fires are mainly caused by people, but might also occasionally start naturally (Horn & Kappelle 2009, Keating 2007, White 2013. Although fires happened at the early Holocene, before people arrived in the Andes (Di ), these natural fire regimes changed once people had arrived (Buytaert et al 2006, Villota et al 2014. Nowadays, fires are set by farmers to encourage new green shoots for their livestock and as part of the process of converting the grassland into cultivation (Cleef 2008, Mena et al 2001, Premauer & Vargas Ríos 2004.…”

Section: Introductionmentioning

confidence: 99%

Physiognomic responses of páramo tussock grass to time since fire in northern Ecuador

Gutiérrez-Salazar

Ramsay

2020

Rev peru biol

View full text Add to dashboard Cite

Ecologically-sound management plans for high-altitude grasslands of the Andes depend on an understanding the responses of plants to fire, especially the dominant tussock grasses. This study considers physiognomic responses of tussock grass in 13 sites in northern Ecuador with a known fire history, with time since fire 0.5–10 y, and a control site which had not been burned for at least 40 y. At each site, we assessed vegetation height, basal cover of the tussocks, and the ratio of dead:live leaves in tussocks. We also measured light at ground level. As recovery time increased, tussock cover and number decreased, while tussock height increased. Light levels fell sharply below the tussock canopies as recovery took place, and dead leaves accumulated quickly, reaching 60 – 70% by just two years after fire. The modification of physical tussock structure is likely to influence a much wider ecosystem response to fire, and determines directly the fuel load for future fires. Despite these clear changes in tussock characteristics, they were too variable to be used as a reliable bioindicator of time since fire. However, a better understanding of the responses of tussock grasses to fire and particularly its impact on other species should become the focus of further attention in future.

show abstract

Multitemporal Incidence of Landscape Fragmentation in a Protected Area of Central Andean Ecuador

Rosero

Otero

Bravo

et al. 2023

Land

View full text Add to dashboard Cite

Monitoring land cover changes in protected areas is crucial to control the conservation efficiency of biodiversity and natural ecosystem conditions, especially in Ecuador, one of the most megadiverse countries in the world. Therefore, the purpose of the present study has been to estimate spatiotemporal changes in the landscape and the level of fragmentation using remote sensing in Llanganates National Park (PNL), a protected area in central Andean Ecuador. To obtain land cover, satellite images were processed using the Maximum Likelihood Classification (MLC) algorithm. After statistical analysis, it was encountered that there is no significant difference in land cover change between the years 1991 to 2016 nor among the three watersheds, while the level of fragmentation in the PNL is low. Land cover changes in the study area are not evident, as it is a protected area where ecosystems are usually expected to maintain their initial conditions over time. Therefore, with these results it has been concluded that the biodiversity and landscape conservation processes in the PNL are effective.

show abstract

Mid- and late Holocene vegetation and environmental dynamics in the Llanganates National Park, Anteojos Valley, central Ecuadorian Andes

Cited by 3 publications

References 42 publications

Three millennia of vegetation and environmental dynamics in the Lagunas de Mojanda region, northern Ecuador

Three millennia of vegetation and environmental dynamics in the Lagunas de Mojanda region, northern Ecuador

Physiognomic responses of páramo tussock grass to time since fire in northern Ecuador

Multitemporal Incidence of Landscape Fragmentation in a Protected Area of Central Andean Ecuador

Contact Info

Product

Resources

About