Results 131 to 140 of about 42,411 (234)
The spread of non‐native species
ABSTRACT The global redistribution of species through human agency is one of the defining ecological signatures of the Anthropocene, with biological invasions reshaping biodiversity patterns, ecosystem processes and services, and species interactions globally.
Phillip J. Haubrock +16 more
wiley +1 more source
We use Dulac criterion to prove the nonexistence of periodic orbits for a class of general predator-prey system with strong Allee effect in the prey population growth.
Jinfeng Wang, Junping Shi, Junjie Wei
doaj
Evidence for an Allee effect in a declining fur seal population. [PDF]
Nagel R +5 more
europepmc +1 more source
Key Points We recommend using the notation δ122/118SnNIST SRM 3161a for mass‐dependent Sn isotope data. We derived conversion factors relative to NIST SRM 3161a for Puri Sn CEZA (0.132 ± 0.011‰), Sn Lyon (0.229 ± 0.016‰), Sn IPGP (0.162 ± 0.018‰). Tin isotope compositions are presented for SPEX CertiPrep Sn and nine USGS reference materials.
Aurélia C.E. Meister +10 more
wiley +1 more source
LDAcoop: Integrating non‐linear population dynamics into the analysis of clonogenic growth in vitro
Limiting dilution assays (LDAs) quantify clonogenic growth by seeding serial dilutions of cells and scoring wells for colony formation. The fraction of negative wells is plotted against cells seeded and analyzed using the non‐linear modeling of LDAcoop.
Nikko Brix +13 more
wiley +1 more source
An experimental test of the Allee effect range limitation hypothesis. [PDF]
Merker SA, Chandler RB.
europepmc +1 more source
We translocated the native cavity‐nesting bee Exoneura robusta into an urban greenspace using artificial nests to test short‐term establishment success. Five of eleven nests persisted through a full annual cycle, demonstrating that urban environments can support early colony establishment.
Mulan Wang, Julian Brown
wiley +1 more source
Stability and bifurcation analysis in a predator prey model involving additive Allee effect
In this paper we study codimension 1 Hopf bifurcation for a two dimensional autonomous nonlinear ordinary differential equations system, modeling a predator-prey interaction with Holling type II functional response and additive Allee effect in the prey ...
Jocirei Dias Ferreira +2 more
doaj
Allee effect in a manipulative parasite within poikilothermic host under temperature change. [PDF]
Mironova E +4 more
europepmc +1 more source
Skewed sex ratios frequently constrain colony performance and limit the efficiency of large‐scale rearing systems. For Spodoptera litura, the 1:1 initial sex ratio maximizes female longevity and fecundity. When this ratio is scaled to colony sizes of 20:20, 40:40 and 60:60, the 40:40 configuration yields the best overall reproductive performance, while
Chuanzhen Xue +11 more
wiley +1 more source

