Fallow management for steppe bird conservation: the impact of cultural practices on vegetation structure and food resources

David Giralt and Gerard Bota, members of BAC lab,  have recently published a paper titled “Fallow management for steppe bird conservation: the impact of cultural practices on vegetation structure and food resources”.

Jointly with Irene Robleño (UdL) and Jordi Recasens(UdL), David Gerard and Gerard Bota have published a paper in the journal “Biodiversity and Conservation”. The main topic of this article is to understand how the management of fallow lands can affect its suitability for being habitat of steppe birds.

This article is part of the doctoral thesis of Irene Robleño, performed in the Department of Hortofructicultura, Botànica i Jardineria, Agrotecnio, ETSEA (UdL)

Abstract

The potential of fallow lands to favor farmland bird conservation is widely recognized. Since fallows provide key resources for birds within the agricultural matrix, such as nesting sites, shelter and forage, complete understanding of the effect of field-management strategies on vegetation structure and food is essential to fulfill bird requirements and improve habitat management. In this study we experimentally compare the most common field practices (ploughing, shredding, herbicide application and cover cropping) on fallow lands by assessing the resources they provide for birds in terms of vegetation structure and food resources (leaf and seed availability), as well as the economic costs of their implementation. Fallow management treatments are ranked for six target species in a lowland area of the north-eastern Iberian Peninsula, according to the available information on their requirements. The different agronomic practices offer various quantities and types of resources, highlighting the importance of fallow management in bird conservation. Shredding and early herbicide application (February) are estimated to be good practices for Little Bustard (Tetrax tetrax) and Calandra Lark (Melanocorypha calandra), providing both favorable habitat and foraging conditions, while being economical. Meanwhile, superficial tillage in spring is found to be optimum for the rest of the species tested, despite being among the poorest food providers. Alternating patches of the best treatments would improve the effectiveness of agri-environmental schemes by maximizing the harboring habitat for the endangered species.

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