open-topped, passive warming chambers designed according to the protocols of the International Tundra Experiment (ITEX) to quantify short- and long-term vegetation community composition and productivity responses to warming and herbivory. Eric PostBy BOB WEBER, The Canadian Press Climate change is already having a dramatic effect on plants in the High Arctic, turning the once rocky tundra a deep shade of green and creating what could be another mechanism speeding up global warming. In a new study to be published in the November issue of the journal Ecology, University of British Columbia geographer Greg Henry has, for the first time, confirmed that rapidly rising temperatures in the Arctic are creating major changes in the plants that live there. “It’s happening so quickly,” says Henry. Henry first came to Alexandra Fiord on the east coast of Ellesmere Island in the 1980s to examine plants growing there. He found a harsh landscape covered with tiny Arctic willows, heather, dryas and blueberries, none taller than 10 centimetres. Since those days, the average temperature in the area has increased by about 2.5 C — “an extremely rapid change,” says Henry. … “That’s an extremely rapid change,” says Henry. “That’s just unbelievable.” …

Climate change doubles tundra plant life, boosting shrubs, grasses via Apocadocs