Lotic

Two major categories of freshwater ecosystems can be defined as lotic (flowing water) and lentic (standing water), but large variation in size, characteristics, and location is exhibited within each. ❋ Unknown (2009)

Rivers and streams are characterized by flowing waters and are called lotic systems (as opposed to lentic systems, such as lakes). ❋ Unknown (2008)

In this sense the term "river" includes all kinds of watercourses, from the tiniest of brooks to the largest of rivers (the term "streams are characterized by flowing waters and are called lotic systems (as opposed to lentic systems, such as Biodiversity Institute of Ontario) ❋ Unknown (2010)

Loss of permafrost increases the potential for many northern shallow lotic systems to dry out from a warmer temperature regime. ❋ Unknown (2009)

The dynamics of many of the lotic (river) and lentic (lake) environments in the Arctic are related to permafrost, and freezing can reduce or even halt the flow of rivers. ❋ Unknown (2009)

For the purposes of this assessment, lotic ecosystems include rivers, streams, deltas, and estuaries, where flow regimes are a dominant hydrologic feature shaping their ecology. ❋ Unknown (2009)

The greatest ice-related ecological impacts of climate change on arctic lotic systems are likely to result from changes in breakup timing and intensity. ❋ Unknown (2009)

Changes in the timing and duration of river ice formation will also alter the dissolved oxygen (DO) regimes of arctic lotic ecosystems. ❋ Unknown (2009)

Nutrient availability often determines food availability and lotic productivity, which are believed to be major controlling factors in riverine fish production. ❋ Unknown (2009)

As continuity of deposition and preservation potential are not equal in all environments, there is a systematic bias in the paleoclimatic record toward well-preserved lentic environments, and to a lesser extent wetlands, as compared to lotic systems. ❋ Unknown (2009)

Changes in the importance of lotic and littoral diatoms in a high arctic lake over the last 191 years. ❋ Unknown (2009)

Still smaller types of lotic systems include medium to small rivers that arise wholly within the Arctic. ❋ Unknown (2009)

Sedimentary deposits in lotic systems are often poorly preserved compared to lentic systems, owing to the relatively greater reworking of most riverine deposits. ❋ Unknown (2009)

Similar to the situation for arctic lotic systems, an enhanced supply of nutrients and organic matter from the more biologically productive contributing basins is likely to boost primary productivity [47]. ❋ Unknown (2009)

Past river discharge can also be studied by tracking the abundance of lotic diatoms in the sediments of lake basins, such as demonstrated for a lake in the high Arctic [21]. ❋ Unknown (2009)

Two-thirds of larval odonates occur in ponds, marshes, swamps and lakes, while the other species breed in lotic habitats such as streams. ❋ Unknown (2008)

Dams play a major role in fragmenting and modifying aquatic habitats, transforming lotic (running water) ecosystems into lentic (standing water) and semi-lentic ecosystems, altering the flow of matter and energy, and establishing barriers to migratory species movement. ❋ Unknown (2008)

Of particular note is the wide range of lentic and lotic ecosystems. ❋ Unknown (2008)

The Lost Streams of Idaho constitute an unique set of isolated lotic environments that are separated from other systems by the Eastern Snake River Basalt Plains (12g). ❋ Unknown (2008)

The river continuum is thus a very important concept in the overall study of lotic systems, and one that is pertinent to many of the later sections. ❋ Unknown (2008)