CONSIDERING SPATIAL AND TEMPORAL VARIABILITY OF FLOODS IN STREAM RESTORATION: EFFECTS OF HYDROCLIMATE ON THE STABILITY OF CHANNEL MORPHOLOGY AND AQUATIC HABITAT

In order to investigate the articulatory processes of the hasty and mumbled speech of clutterers, the kinematic variability was analysed by means of electromagnetic midsagittal articulography (EMMA). In contrast to stutterers, clutterers improve their intelligibility by concentrating on their speech task. Variability is an important criterion in comparable studies of stuttering and is discussed in terms of the stability of the speech motor system. The aim of the current study was to analyse the spatial and temporal variability in the speech of three clutterers and three control speakers. All speakers were native speakers of German. The speech material consisted of repetitive CV-syllables and foreign words, because clutterers have the most severe problems with long words which have a complex syllable structure. The results showed a higher quotient of variation for clutterers in the foreign word production. For the syllable repetition task, no significant differences between clutterers and controls were found. The extremely large and variable displacements were interpreted as a strategy that helps clutterers to improve the intelligibility of their speech.

Download Full-text

Spatial and temporal variability of aquatic habitat use by amphibians in a hydrologically modified landscape

Freshwater Biology ◽

10.1111/j.1365-2427.2011.02655.x ◽

2011 ◽

Vol 56 (11) ◽

pp. 2288-2298 ◽

Cited By ~ 21

Author(s):

TIBOR HARTEL ◽

RALUCA BĂNCILĂ ◽

DAN COGĂLNICEANU

Keyword(s):

Habitat Use ◽

Temporal Variability ◽

Aquatic Habitat ◽

Spatial And Temporal Variability

Download Full-text

Comment on “Does timber harvest influence the dynamics of marine-derived nutrients in Southeast Alaska streams?” 1Original article by Levi et al. appears in Can. J. Fish. Aquat. Sci. 68(8): 1316–1329 and is available at http://www.nrcresearchpress.com/doi/full/10.1139/f2011-067. Reply by Levi et al. appears in Can. J. Fish. Aquat. Sci. 69: this issue, and is available at http://www.nrcresearchpress.com/doi/full/10.1139/f2012-106.

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f2012-104 ◽

2012 ◽

Vol 69 (11) ◽

pp. 1894-1897 ◽

Cited By ~ 1

Author(s):

C. Rhett Jackson ◽

Douglas J. Martin

Keyword(s):

Temporal Variability ◽

Nutrient Dynamics ◽

Timber Harvest ◽

Channel Morphology ◽

Nutrient Concentrations ◽

Spatial And Temporal Variability ◽

Southeast Alaska ◽

Channel Conditions ◽

Sample Set ◽

Marine Derived Nutrients

Levi et al. (2011, Can. J. Fish. Aquat. Sci. 68: 1316–1329) related nutrient concentrations before, during, and after spawning, as well as various measures of channel morphology, to levels of prior timber harvest in seven watersheds on Prince of Wales Island in Southeast Alaska, USA. They assumed that single reaches of seven streams were otherwise similar and that other controls on channel morphology and nutrient dynamics could be ignored relative to the effects of prior timber harvest. In this commentary we show that the seven watersheds were not similar and that the sample set was too small to address geomorphic variability unrelated to timber harvest. Levi et al. failed to consider adequately the natural drivers of spatial and temporal variability in channel morphology and to consider stronger alternate hypotheses for observed channel conditions.

Download Full-text