A new study by Dalhousie researchers used an innovative analytical technique to provide a new estimate of the total number of species on Earth. The estimate of 8.7 million species (plus or minus 1.3 million species) is the most precise calculation of this number to date. The paper, published in PLoS Biology, reveals that 6.5 million species are found on land and 2.2 million live in the oceans. And incredibly, the study predicts that 86% of all species on land and 91% of all species in the oceans have yet to be discovered and described.

Large reductions in the abundance of exploited land predators have led to significant range contractions for those species. This paper shows similar responses in highly mobile tuna and billfish. It implies ecological extirpation of heavily exploited species across parts of their range.

Sharks of the Atlantic Research and Conservation Coalition (ShARCC) aims to be a coalition of academia, industry, governmental, and non-governmental organizations. The goal of ShARCC is to promote elasmobranch (sharks, skates and rays) conservation in Atlantic Canada through research, outreach, changes on the water and improved management, ultimately leading to the protection and recovery of these species.

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An unprecedented collection of historical and recent oceanographic data was used to document phytoplankton declines of approximately 1% of the global average per year over the past century. Long-term phytoplankton declines were correlated with rising sea surface temperatures.

FMAP researchers examined global patterns and predictors of species richness across 13 major species groups ranging from zooplankton to marine mammals and identified water temperature as the main environmental predictor of biodiversity patterns in the ocean.

A study synthesizing the nature and scale of the ecological consequences of shark declines in the global ocean uncovered overall patterns and presents new evidence for the importance of shark populations to the rest of the marine world.

A recent study examined current trends in fish abundance and exploitation rates globally and identified successful management solutions for rebuilding depleted fish stocks. Steps taken to curb overfishing are beginning to succeed, yet 63% of assessed fish stocks worldwide still require rebuilding.

A new study provides the first global evaluation of how management practices influence fisheries' sustainability. The study assessed the effectiveness of the world's fisheries management regimes using evaluations by nearly 1,200 fisheries experts and analyzing these in combination with data on the sustainability of fisheries catches.