The southern United States is characterized by a humid, subtropical climate and consists of
16 states (Texas, Oklahoma, Arkansas, Louisiana, Mississippi, Tennessee, Kentucky …

This review examines research focusing on nitrate retention in streams and rivers impacted
by agriculture in temperate and continental climate regions. Most studies of nitrate retention …

Rates of whole‐system metabolism (production and respiration) are fundamental indicators
of ecosystem structure and function. Although first‐order, proximal controls are well …

River ecosystems are subject to multiple stressors that affect their structure and functioning.
Ecosystem structure refers to characteristics such as channel form, water quality or the …

River networks modify material transfer from land to ocean. Understanding the factors
regulating this function for different gaseous, dissolved, and particulate constituents is critical …

Riverine environments, such as streams and rivers, have been reported as sources of the
potent greenhouse gas nitrous oxide (N 2 O) to the atmosphere mainly via microbially …

The importance of lotic systems as sinks for nitrogen inputs is well recognized. A fraction of
nitrogen in streamflow is removed to the atmosphere via denitrification with the remainder …

We measured denitrification rates using a field 15NO3− tracer‐addition approach in a large,
cross‐site study of nitrate uptake in reference, agricultural, and suburban‐urban streams …

We used high‐frequency in situ measurements of nitrate (NO3−) and dissolved oxygen (DO)
from the springfed Ichetucknee River, Florida, to derive multiple independent estimates of …

As catchments become increasingly urban, the streams that drain them become increasingly
degraded. Urban streams are typically characterized by high‐magnitude storm flows …