WASHINGTON, Oct 13 (Reuters) - International Monetary Fund members are calling more strongly for an end to the war in Ukraine, which is having a sharply negative impact on global economic growth, Spanish Finance Minister Nadia Calvino told Reuters on Thursday. Calvino, elected in January to head the IMF's steering committee, said this week's annual meetings of the IMF and World Bank were marked by deep uncertainty about the war, which she said symbolized a "tectonic shift" in the principles that have guided the global world order since the end of World War Two. Calvino said the global nature of the overlapping challenges facing the world was a "wakeup call" about the importance of international institutions like the IMF. That's putting up reinsurance mechanisms, financial support mechanisms, debt relief mechanisms to protect the financial stability of the whole world," she said. Quota reform, another key demand of IMF critics and activists, would be addressed later, she said.

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