Stephen L. Peterson* Ecological succession and climate change are pushing tundra as well as Arctic and subarctic Robert F. Rockwell† lowland plant communities toward increased woody vegetation cover. However, areas Christopher R. Witte† and along the Hudson Bay Lowlands that are over-grazed by hyper-abundant lesser snow geese David N. Koons‡ are experiencing drastic losses of grass, sedge, and ...

Beach-east wl"ack of tam'hie origin is considered a spafiM subsidy to the maa-hle4en-emn-ial trallsifion zone. We fotmd lhat lhe x~'ack line on sm~d aald ga'aveI beaches of Vancouver Island was fi-eq~mnted by h~terlidaI purple shore crabs~ Hernig~tpsus nudus (Daua 1851 ) and densely colonized by de~h ivorous talitsrid ampbipods . Amphipods spend the day bm'ied in sm~d and forage on beach w*aek ...

-The Mesozoic to Eocene sedimentary succession of Hazara Basin dominated by carbonates is characterized by a distinct package of sediments punctuated by a number of diastems, hiatus and unconformities. The Hazara Basin evolved in Hettangian with the development of lagoonal to upper shoreface conditions on the northern margin of northward flying India. It was followed by a thick pile of middle J...

In this section, we critically review a variety of so-called ‘wrinkle structures’ in an attempt to help distinguish between crinkly decorations arising from physical processes that acted on siliciclastic bedding surfaces, and true microbially induced ‘wrinkle structures’. The latter, however, are not easily differentiated from the numerous small-scale, crinkly irregularities on ancient bedding ...

Abstract Co‐seismic uplift of Kaikōura Peninsula in 2016 has substantially reduced the number wetting and drying cycles that occur on shore platforms newly uplifted incipient marine terraces. A simple empirical model incorporating field laboratory measurements was used to determine frequency cycles. The mudstone supratidal terraces are vulnerable material disintegration slaking through sustaine...

Abstract Soil salinity plays an essential role in the growth of mangroves. Mangroves usually grow intertidal zones. However, Karimunjawa National Park (KNP), Indonesia, mangroves are also found supratidal Thus, this study aims to determine why can zone, even during dry season. We analyze seasonal changes groundwater flow and dynamics using hydraulic head, shallow salinity, electrical resistivit...