Barely Significant

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Chlorophyll fluorescence parameters Under TR4, TR6, TR6L, and TR6S, with DAF, the actual photochemical efficiency of PSII (ΦPSII) and photochemical quenching coefficient (qp) of both NS22 and NS44 showed a trend to decline, and the decline was slow in the early period and sharp in the later period ( Figure 6 ).
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Relationships between community species diversity and different functional group species Under nitrogen-non-limiting conditions, community species richness showed a highly significant, positive correlation with the richness of forbs and a strong positive correlation with the richness of bunch grasses, whereas it was strongly negatively correlated with the relative biomass of rhizomatous grasses ( Figure 6 ).
There is an increasing trend from 0 to 491 m above elev, reaching a maximum at 491 m, with the survival probability of 0.62; after that the survival probability decreases sharply with increasing altitude; The probability of the presence of A. dahurica was greatest when the precipitation of driest quarter was 43 mm, and the survival probability of the presence of A. dahurica was low at a slope of < 0.
For the annual mean precipitation, during the entire prediction period (2010–2099), the forest region of Northeast China showed an increasing trend in almost all areas under the three distinct climate warming scenarios (RCP2.6, RCP4.5, and RCP8.5), except in the southern part of the CBM, where precipitation decreased significantly relative to the baseline period ( Figure 4 ).