Two ecotypes of the common bottlenose dolphin ( Tursiops truncatus ) occur in New Zealand waters: a widely studied Nationally Endangered coastal ecotype and a little‐known oceanic ecotype. Site fidelity and association patterns of the oceanic ecotype, and home range overlap with the coastal ecotype, are examined from photo‐identification records collected off northeastern New Zealand between 2005 and 2016. The oceanic ecotype...

On a global scale, false killer whales ( Pseudorca crassidens ) remain one of the lesser‐known delphinids. The occurrence, site fidelity, association patterns, and presence/absence of foraging in waters off northeastern New Zealand are examined from records collected between 1995 and 2012. The species was rarely encountered; however, of the 61 distinctive, photo‐identified individuals, 88.5% were resighted, with resightings up...

The stability of Antarctic ice sheets and their potential contribution to sea level under projected future warming remains highly uncertain. The Last Interglacial (135 000–116 000 years ago) provides a potential analogue, with global temperatures 2 °C higher and rates of sea‐level rise >5.6 m ka −1 , leading to sea levels 6.6–9.4 m higher than present. The source(s) of this sea‐level rise remain fiercely debated. Here we repor...

Lysimeter trials carried out over several years showed that cutting mineral fertilizer by 50% does not immediately result in a reduction of the leaching losses of relevant macronutrients (N, P, K). Land usage changes in the form of 1‐year rotating set‐asides entail greater N‐leaching compared to best management practices (BMP). By contrast, after set‐aside lasting 3–5 years, reductions in N‐leaching of 25–45% must be expected....