The harsh desert environment led to the emergence of the "versatile tribesman", nomadic groups who subsisted due to a variety of economic activities, including animal husbandry, agriculture and hunting. The seasonal movements of these groups led to not only frequent clashes between groups but also the establishment of seasonal and semi-seasonal settlements and centres. These formed tribal groupings whose names are still carried by modern Emiratis, including the Bani Yas and Al Bu Falah of Abu Dhabi, Al Ain, Liwa and the west coast, the Dhawahir, Awamir, Al Ali and Manasir of the interior, the Sharqiyin of the east coast and the Qawasim to the North.