27 research outputs found
Recommended from our members
Source and Source Relations
In seeking to understand the construction of news, how journalist-source relationships function is a core concern of journalism studies. These relationships are not necessarily a simple one-way transfer of information but can be a complex interaction that may require understanding of journalism practices, journalism ethics, media law, commerce and the state to elucidate. Normatively, whether identified, anonymous or confidential sources or whistle-blowers, sources can provide journalists with the means to challenge official and elite narratives. This entry details the type and nature of professional relationships between journalists and their personal sources and note the mounting threats to this vital practice. While there are laws to protect journalistâs sources, international organisations note they are at risk of erosion, restriction and compromise - a direct challenge to the universal human rights of freedom of expression and a threat to investigative journalism
Remote detection of invasive alien species
The spread of invasive alien species (IAS) is recognized as the most severe threat to biodiversity outside of climate change and anthropogenic habitat destruction. IAS negatively impact ecosystems, local economies, and residents. They are especially problematic because once established, they give rise to positive feedbacks, increasing the likelihood of further invasions and spread. The integration of remote sensing (RS) to the study of invasion, in addition to contributing to our understanding of invasion processes and impacts to biodiversity, has enabled managers to monitor invasions and predict the spread of IAS, thus supporting biodiversity conservation and management action. This chapter focuses on RS capabilities to detect and monitor invasive plant species across terrestrial, riparian, aquatic, and human-modified ecosystems. All of these environments have unique species assemblages and their own optimal methodology for effective detection and mapping, which we discuss in detail