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Sukumar, Raman
- Addressing the Management of a Long-established Invasive Shrub: the Case of Lantana Camara in Indian Forests
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Authors
Affiliations
1 Centre for Ecological Sciences, Indian Institute of Science, Bangalore 560012, Karnataka, IN
2 CSIRO Ecosystem Sciences – Atherton, Maunds Road, Atherton QLD 4883, Australia, IN
3 Rajaji National Park, Uttarakhand Forest Department, IN
1 Centre for Ecological Sciences, Indian Institute of Science, Bangalore 560012, Karnataka, IN
2 CSIRO Ecosystem Sciences – Atherton, Maunds Road, Atherton QLD 4883, Australia, IN
3 Rajaji National Park, Uttarakhand Forest Department, IN
Source
Indian Forester, Vol 140, No 2 (2014), Pagination: 129-136Abstract
Since its introduction in India 200 years ago, Lantana camara (Lantana) has become established and naturalised across a wide range of habitats. In Indian protected areas, lantana has been predominately managed using a range of mechanical removal approaches, costing up to 6000 per hectare. However, managed sites are rapidly recolonized by lantana and management programmes rarely achieve their goal of lantana eradication. In present study, we quantified recolonisation of lantana at sites that were either managed only once or for two consecutive years in Rajaji National Park, Uttarakhand. Rapid recolonisation and recruitment is occuring from seed dispersal from surrounding lantana populations, soil seed banks and vegetative regeneration. To manage lantana effectively we need to consider these ecological processes. An alternate management programme is recommended for long-established invasive plants such as lantana, that focuses on (a) prioritizing critical habitats that require management of invasive species (b) long-term monitoring and management scaled to timeframes of ecological processes, i.e., lantana dispersal and soil seed banks, and (c) phased enlargement of managed sites such that over time, high-priority habitats can be isolated from dispersal originating from surrounding lantana source populations.Keywords
Dispersal, Invasive Species Management, Lantana Camara, Rajaji National Park, Regeneration.
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- Fire and Soil Temperatures during Controlled Burns in Seasonally Dry Tropical forests of Southern India
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Authors
Affiliations
1 Centre for Ecological Sciences, Indian Institute of Science, Bangalore 560 012, IN
1 Centre for Ecological Sciences, Indian Institute of Science, Bangalore 560 012, IN
Source
Current Science, Vol 107, No 9 (2014), Pagination: 1590-1594Abstract
Fire and soil temperatures were measured during controlled burns conducted by the Forest Department at two seasonally dry tropical forest sites in southern India, and their relationships with fuel load, fuel moisture and weather variables assessed using stepwise regression. Fire temperatures at the ground level varied between <79°C and 760°C, with higher temperatures recorded at high fuel loads and ambient temperatures, whereas lower temperatures were recorded at high relative humidity. Fire temperatures did not vary with fuel moisture or wind speed. Soil temperatures varied between <79°C and 302°C and were positively correlated with ground-level fire temperatures. Results from the study imply that fuel loads in forested areas have to be reduced to ensure low intensity fires in the dry season. Low fire temperatures would ensure lower mortality of above-ground saplings and minimal damage to ischolar_main stocks of tree species that would maintain the regenerative capacity of a tropical dry forest subject to dry season wildfires.Keywords
Biligiri Rangaswamy Temple Wildlife Sanctuary, Fuel Load, Fuel Moisture, Mudumalai Wildlife Sanctuary, Temperature Indicating Lacquers, Weather.Full Text