Adaptive strategies of Melipona subnitida under nutritional stress in semi-arid environments

Abstract

The bee Melipona subnitida, popularly known as jandaíra, is a native species of Northeastern Brazil that plays a fundamental role in the pollination of both native and cultivated plants. Its natural habitat is characterized by semi-arid conditions, with high temperatures, low humidity, and long periods of floral scarcity. In this context, the species has developed adaptive strategies that ensure its survival and the maintenance of the colony even under nutritional stress. One of the main strategies is related to efficiency in resource use and storage. Jandaíra bees store pollen and honey in wax pots, creating reserves for critical periods. They also exhibit selective foraging, prioritizing plants with greater nectar and pollen availability during times of scarcity. This selectivity helps optimize energy expenditure and maintain colony nutrition. Another important adaptive aspect is social behavior. Task division within the colony ensures that more experienced workers focus on resource collection, while others handle brood care and colony maintenance. This organizational balance allows the colony to endure periods of low floral availability, minimizing energy losses and increasing efficiency in the use of stored food. Physiologically, studies indicate that M. subnitida can adjust its metabolism under nutritional restriction, reducing energy consumption and modulating brood production according to resource availability. The queen’s egg-laying activity may temporarily decrease, preventing colony collapse due to food shortages. This reproductive plasticity is essential in semi-arid environments, where rainfall seasonality directly affects plant availability. Ecological interactions also play a key role in adaptation. Jandaíra bees demonstrate the ability to exploit a wide range of plant species, including native Caatinga flora, many of which are drought-adapted. This dietary flexibility increases the chances of finding resources even in critical periods. Additionally, floral fidelity observed at certain times ensures effective pollination and the maintenance of local plant populations, reinforcing the ecological balance of the semi-arid region. In summary, the survival of Melipona subnitida in semi-arid environments relies on a set of integrated strategies involving efficient storage, selective foraging, social organization, physiological adjustments, and dietary flexibility. These adaptations not only guarantee colony continuity but also strengthen the species’ ecological and economic importance, especially in the context of meliponiculture. Understanding these mechanisms is essential for promoting the conservation of jandaíra bees and sustainable management in regions affected by nutritional stress and climate change.