The impacts of house mice (Mus musculus), one of four invasive rodent species in New Zealand, are only clearly revealed on islands and fenced sanctuaries without rats and other invasive predators which suppress mouse populations, influence their behaviour, and confound their impacts. When the sole invasive mammal on islands, mice can reach high densities and influence ecosystems in similar ways to rats.
Following the incursion of rats (Rattus rattus) on Taukihepa (Big South Cape Island; 93.9 km²) off southern New Zealand in 1963, and the subsequent extirpation of several endemic species, the New Zealand Wildlife Service realised that, contrary to general belief at the time, introduced predators do not reach a natural balance with native species and that a safe breeding habitat for an increasing number of at risk species was urgently needed.
Rat eradication is a highly effective tool for conserving biodiversity, but one that requires considerable planning eff ort, a high level of precision during implementation and carries no guarantee of success. Overall, rates of success are generally high but lower for tropical islands where most biodiversity is at risk. We completed a qualitative comparative review on four successful and four unsuccessful tropical rat eradication projects to better understand the factors influencing the success of tropical rat eradications and shed light on how the risk of future failures can be minimised.
The Baja California Pacifc Islands, Mexico, are globally important breeding sites for 22 seabird species and subspecies. In the past, several populations were extirpated or reduced due to invasive mammals, human disturbance, and contaminants. Over the past two decades, we have removed invasive predators and, for the last decade, we have been implementing a Seabird Restoration Programme on eight groups of islands: Coronado, Todos Santos, San Martín, San Jerónimo, San Benito, Natividad, San Roque, and Asunción.
Considerable bene?ts can be achieved for indigenous biodiversity when invasive vertebrates are removed from islands. In New Zealand, two logistically challenging eradications were undertaken, one to remove cats (Felis catus) and the other Paci?c rats (Rattus exulans) from Te Hauturu-o-Toi/Little Barrier Island (Hauturu). Here we document the short- and long-term impacts of these interventions on the biodiversity of Hauturu. We also assess the extent to which predicted outcomes were re?ected in the measured responses for a wide range of species.
The process by which individuals, groups, organisations, institutions and societies increase their abilities to:
Perform core functions, solve problems, define and achieve objectives
Understand and deal with their development needs in a broad context and in a sustainable manner.
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Call Number: [EL]
Physical Description: 129 p.
As early as 1990 the Intergovernmental Panel on Climate Change (IPCC) noted that the greatest single impact of climate change might be on human migrationwith millions of people displaced by shoreline erosion, coastal flooding and agricultural disruption.3 Since then, successive reports have argued that environmental degradation, and in particular climate change, is poised to become a major driver of population displacementa crisis in the making.
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Call Number: [EL]
Physical Description: 64 p.
The main purpose of this paper is to help policy makers,
particularly those in developing countries, think about the national policy instruments needed to contribute to the
fight against climate change, how such needs can be articulated in order to seek internal and external financial resources and how these needs may be reflected in negotiations of a future climate change agreement. This paper is an input to a series of workshops which the United Nations Development Program (UNDP) will organize in developing countries with the aim of improv-
Climate change is one of the greatest threats to our
planet and its people. Reducing emissions of greenhouse
gases (GHG) is called mitigation. Responding to the impacts of climate change is called adaptation. A certain amount of adaptation will be necessary, no matter what we do. But, there will come a point where it will not be possible to adapt our way out of the problem.
In 2007, the UNFCCC Secretariat prepared a report on
"Investment and Financial Flows to Address Climate
Change".11 The report covers mitigation and adaptation in
various sectors over the period to 2030. The report defines
an investment as the initial (capital) cost of a new physical
asset with a life of more than one year, such as the capital
cost of a gas-fired generating unit or a water supply
system. A financial flow is an ongoing expenditure related
to climate change mitigation or adaptation that docs not